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/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:52:13,316 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:52:13,320 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:52:13,332 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:52:13,333 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:52:13,334 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:52:13,335 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:52:13,337 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:52:13,339 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:52:13,340 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:52:13,340 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:52:13,365 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:52:13,380 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:52:13,380 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:52:13,381 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:52:13,382 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:52:13,382 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:52:13,382 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:52:13,383 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:52:13,383 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:52:13,383 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:52:13,383 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:52:13,383 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:52:13,384 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:52:13,384 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:52:13,384 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:52:13,384 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:52:13,384 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:52:13,385 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:52:13,385 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:52:13,385 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:52:13,385 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:52:13,385 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:52:13,386 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:52:13,386 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:52:13,386 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:52:13,386 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:52:13,386 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:52:13,386 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:52:13,387 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:52:13,387 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:52:13,387 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:52:13,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:52:13,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:52:13,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:52:13,448 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:52:13,448 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:52:13,449 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-10-02 11:52:13,450 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-10-02 11:52:13,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:52:13,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:52:13,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:52:13,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:52:13,511 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:52:13,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,554 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:52:13,554 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:52:13,555 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:52:13,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:52:13,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:52:13,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:52:13,558 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:52:13,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... [2018-10-02 11:52:13,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:52:13,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:52:13,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:52:13,585 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:52:13,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:52:13,665 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-02 11:52:13,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 11:52:13,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 11:52:13,871 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:52:13,872 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:52:13 BoogieIcfgContainer [2018-10-02 11:52:13,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:52:13,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:52:13,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:52:13,877 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:52:13,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:13" (1/2) ... [2018-10-02 11:52:13,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604ea0ef and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:52:13, skipping insertion in model container [2018-10-02 11:52:13,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:52:13" (2/2) ... [2018-10-02 11:52:13,880 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-10-02 11:52:13,890 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:52:13,898 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:52:13,950 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:52:13,951 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:52:13,951 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:52:13,952 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:52:13,952 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:52:13,952 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:52:13,952 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:52:13,952 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:52:13,953 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:52:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 11:52:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-02 11:52:13,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:13,976 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-02 11:52:13,977 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:13,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:13,984 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-10-02 11:52:13,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:13,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:14,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:14,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:14,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:14,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:52:14,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 11:52:14,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:52:14,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:52:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:52:14,175 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 11:52:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:14,264 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-02 11:52:14,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:52:14,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-02 11:52:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:14,285 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:52:14,286 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:52:14,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:52:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:52:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:52:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:52:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-10-02 11:52:14,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-10-02 11:52:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:14,380 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-10-02 11:52:14,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:52:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-10-02 11:52:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:52:14,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:14,381 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-02 11:52:14,381 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:14,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-10-02 11:52:14,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:14,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:14,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:14,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:14,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:14,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:52:14,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:52:14,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:52:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:52:14,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:52:14,418 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-10-02 11:52:14,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:14,443 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-10-02 11:52:14,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:52:14,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-02 11:52:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:14,445 INFO L225 Difference]: With dead ends: 12 [2018-10-02 11:52:14,445 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:52:14,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:52:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:52:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:52:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:52:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-02 11:52:14,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-02 11:52:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:14,449 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-02 11:52:14,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:52:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-02 11:52:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:52:14,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:14,450 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-02 11:52:14,451 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:14,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:14,451 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-10-02 11:52:14,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:14,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:14,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:14,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:14,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:14,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:14,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:14,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:14,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:14,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:14,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-02 11:52:14,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:52:14,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:52:14,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:52:14,632 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-02 11:52:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:14,759 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-10-02 11:52:14,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:52:14,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-02 11:52:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:14,761 INFO L225 Difference]: With dead ends: 14 [2018-10-02 11:52:14,761 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:52:14,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:52:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:52:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:52:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:52:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-02 11:52:14,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-10-02 11:52:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:14,765 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-02 11:52:14,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:52:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-02 11:52:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:52:14,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:14,766 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-10-02 11:52:14,767 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:14,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-10-02 11:52:14,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:14,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:14,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:14,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:14,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:14,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:14,914 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 [2018-10-02 11:52:14,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:14,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:14,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:14,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:52:14,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:52:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:52:14,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:52:14,982 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-10-02 11:52:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:15,023 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-10-02 11:52:15,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:52:15,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-02 11:52:15,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:15,024 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:52:15,024 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:52:15,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:52:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:52:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:52:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:52:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-10-02 11:52:15,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-10-02 11:52:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:15,029 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-10-02 11:52:15,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:52:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-10-02 11:52:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:52:15,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:15,030 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-10-02 11:52:15,030 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:15,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:15,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-10-02 11:52:15,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:15,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:15,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:15,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:15,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:15,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:15,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:15,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:15,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:15,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:15,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:15,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:15,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:52:15,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:52:15,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:52:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:52:15,172 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-10-02 11:52:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:15,245 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-02 11:52:15,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:52:15,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 11:52:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:15,247 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:52:15,247 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:52:15,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:52:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:52:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:52:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:52:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-02 11:52:15,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-02 11:52:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:15,252 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-02 11:52:15,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:52:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-02 11:52:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:52:15,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:15,253 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-10-02 11:52:15,253 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:15,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-10-02 11:52:15,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:15,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:15,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:15,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:15,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:15,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:15,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:15,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:15,392 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:15,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:15,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:15,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:15,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:52:15,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:52:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:52:15,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:52:15,441 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-10-02 11:52:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:15,548 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-10-02 11:52:15,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:52:15,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-02 11:52:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:15,549 INFO L225 Difference]: With dead ends: 18 [2018-10-02 11:52:15,549 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:52:15,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:52:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:52:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 11:52:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:52:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-02 11:52:15,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-02 11:52:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:15,554 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-02 11:52:15,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:52:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-02 11:52:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:52:15,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:15,555 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-10-02 11:52:15,556 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:15,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-10-02 11:52:15,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:15,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:15,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:15,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:15,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:15,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:15,721 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 [2018-10-02 11:52:15,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:15,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:52:15,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:15,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:15,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:15,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:52:15,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:52:15,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:52:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:52:15,789 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-10-02 11:52:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:15,822 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-10-02 11:52:15,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:52:15,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-02 11:52:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:15,824 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:52:15,824 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:52:15,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:52:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:52:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:52:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:52:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-02 11:52:15,828 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-10-02 11:52:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:15,829 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-02 11:52:15,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:52:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-02 11:52:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:52:15,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:15,830 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-10-02 11:52:15,830 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:15,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:15,830 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-10-02 11:52:15,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:15,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:15,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:15,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:15,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:15,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:15,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:15,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:15,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-02 11:52:15,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:15,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:16,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:16,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-02 11:52:16,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:52:16,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:52:16,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:52:16,131 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-10-02 11:52:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:16,700 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-02 11:52:16,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:52:16,701 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-02 11:52:16,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:16,702 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:52:16,702 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:52:16,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:52:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:52:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:52:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:52:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-02 11:52:16,707 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-02 11:52:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:16,708 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-02 11:52:16,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:52:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-02 11:52:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:52:16,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:16,709 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-10-02 11:52:16,709 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:16,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:16,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-10-02 11:52:16,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:16,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:16,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:16,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:16,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:16,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:16,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:16,829 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:16,838 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:16,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:16,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:16,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:16,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:52:16,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:52:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:52:16,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:52:16,870 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-10-02 11:52:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:16,903 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-02 11:52:16,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:52:16,903 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-10-02 11:52:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:16,905 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:52:16,905 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:52:16,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:52:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:52:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 11:52:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:52:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-02 11:52:16,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-02 11:52:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:16,910 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-02 11:52:16,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:52:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-02 11:52:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:52:16,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:16,912 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-10-02 11:52:16,912 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:16,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-10-02 11:52:16,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:16,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:16,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:16,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:16,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:17,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:17,028 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:17,038 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:17,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:17,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:17,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:52:17,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:52:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:52:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:52:17,073 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-02 11:52:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:17,120 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-02 11:52:17,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:52:17,121 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-02 11:52:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:17,122 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:52:17,122 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:52:17,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:52:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:52:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 11:52:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:52:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-02 11:52:17,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-10-02 11:52:17,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:17,128 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-02 11:52:17,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:52:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-02 11:52:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:52:17,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:17,129 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-10-02 11:52:17,129 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:17,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-10-02 11:52:17,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:17,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:17,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:17,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:17,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:17,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:17,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:17,255 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:52:17,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:17,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:17,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:52:17,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:52:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:52:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:52:17,290 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-10-02 11:52:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:17,349 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-10-02 11:52:17,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:52:17,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-02 11:52:17,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:17,350 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:52:17,350 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:52:17,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:52:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:52:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:52:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:52:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-02 11:52:17,357 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-10-02 11:52:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:17,357 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-02 11:52:17,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:52:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-02 11:52:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:52:17,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:17,358 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-10-02 11:52:17,358 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:17,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:17,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-10-02 11:52:17,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:17,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:17,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:17,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:17,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:17,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:17,634 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:17,664 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:52:17,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:17,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:17,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:52:17,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:52:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:52:17,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:52:17,696 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-10-02 11:52:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:17,731 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-02 11:52:17,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:52:17,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-10-02 11:52:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:17,733 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:52:17,733 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:52:17,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:52:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:52:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:52:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:52:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-02 11:52:17,739 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-10-02 11:52:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:17,740 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-02 11:52:17,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:52:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-02 11:52:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:52:17,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:17,741 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-10-02 11:52:17,741 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:17,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-10-02 11:52:17,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:17,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:17,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:17,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:17,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:17,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:17,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:17,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:52:17,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:17,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:18,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:18,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-02 11:52:18,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:52:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:52:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:52:18,127 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-10-02 11:52:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:18,494 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-10-02 11:52:18,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:52:18,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-10-02 11:52:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:18,495 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:52:18,495 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:52:18,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:52:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:52:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 11:52:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:52:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-02 11:52:18,501 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-02 11:52:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:18,501 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-02 11:52:18,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:52:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-02 11:52:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:52:18,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:18,502 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-10-02 11:52:18,503 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:18,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-10-02 11:52:18,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:18,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:18,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:18,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:18,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:18,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:18,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:18,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:18,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:18,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:18,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:52:18,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:52:18,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:52:18,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:52:18,842 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-10-02 11:52:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:18,940 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-02 11:52:18,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:52:18,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-10-02 11:52:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:18,941 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:52:18,942 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:52:18,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:52:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:52:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:52:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:52:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-02 11:52:18,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-10-02 11:52:18,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:18,955 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-02 11:52:18,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:52:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-02 11:52:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:52:18,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:18,958 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-10-02 11:52:18,958 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:18,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-10-02 11:52:18,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:18,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:18,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:18,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:18,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:19,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:19,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:19,268 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:19,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:52:19,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:19,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:19,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:19,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:52:19,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:52:19,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:52:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:52:19,332 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-10-02 11:52:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:19,376 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-10-02 11:52:19,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:52:19,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-10-02 11:52:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:19,378 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:52:19,378 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:52:19,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:52:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:52:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:52:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:52:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-02 11:52:19,384 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-10-02 11:52:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:19,384 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-02 11:52:19,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:52:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-02 11:52:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:52:19,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:19,386 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-10-02 11:52:19,386 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:19,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:19,386 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-10-02 11:52:19,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:19,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:19,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:19,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:19,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:19,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:19,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:19,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:19,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:19,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:19,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:19,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:19,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:52:19,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:52:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:52:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:52:19,587 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-10-02 11:52:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:19,642 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-10-02 11:52:19,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:52:19,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-10-02 11:52:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:19,644 INFO L225 Difference]: With dead ends: 36 [2018-10-02 11:52:19,644 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:52:19,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:52:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:52:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 11:52:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:52:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-02 11:52:19,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-02 11:52:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:19,650 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-02 11:52:19,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:52:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-02 11:52:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:52:19,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:19,652 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-10-02 11:52:19,652 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:19,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-10-02 11:52:19,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:19,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:19,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:19,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:19,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:19,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:19,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:19,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:19,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:19,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:19,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:52:19,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:52:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:52:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:52:19,893 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-10-02 11:52:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:19,941 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-10-02 11:52:19,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:52:19,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-10-02 11:52:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:19,943 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:52:19,943 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:52:19,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:52:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:52:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 11:52:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:52:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-02 11:52:19,949 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-10-02 11:52:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:19,949 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-02 11:52:19,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:52:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-02 11:52:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:52:19,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:19,951 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-10-02 11:52:19,951 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:19,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-10-02 11:52:19,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:19,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:19,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:20,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:20,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:20,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:20,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-02 11:52:20,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:20,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:20,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:20,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-02 11:52:20,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:52:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:52:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:52:20,629 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-10-02 11:52:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:21,414 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-10-02 11:52:21,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:52:21,414 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-10-02 11:52:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:21,415 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:52:21,416 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:52:21,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:52:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:52:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:52:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:52:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-02 11:52:21,422 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-10-02 11:52:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:21,423 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-02 11:52:21,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:52:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-02 11:52:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:52:21,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:21,424 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-10-02 11:52:21,424 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:21,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:21,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-10-02 11:52:21,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:21,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:21,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:21,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:21,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:21,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:21,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:21,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:21,621 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:21,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:21,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:21,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:21,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-02 11:52:21,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:52:21,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:52:21,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:52:21,828 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-10-02 11:52:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:22,227 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-10-02 11:52:22,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:52:22,227 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-10-02 11:52:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:22,228 INFO L225 Difference]: With dead ends: 44 [2018-10-02 11:52:22,228 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:52:22,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:52:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:52:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:52:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:52:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-02 11:52:22,233 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-10-02 11:52:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:22,234 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-02 11:52:22,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:52:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-02 11:52:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:52:22,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:22,235 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-10-02 11:52:22,235 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:22,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:22,236 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-10-02 11:52:22,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:22,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:22,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:22,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:22,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:22,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:22,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:22,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:22,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 11:52:22,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:22,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:22,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:22,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:52:22,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:52:22,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:52:22,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:52:22,441 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-10-02 11:52:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:22,526 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-10-02 11:52:22,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:52:22,529 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-10-02 11:52:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:22,529 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:52:22,530 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:52:22,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:52:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:52:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:52:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:52:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-02 11:52:22,534 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-10-02 11:52:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:22,534 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-02 11:52:22,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:52:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-02 11:52:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:52:22,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:22,535 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-10-02 11:52:22,536 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:22,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-10-02 11:52:22,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:22,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:22,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:22,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:22,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:22,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:22,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:22,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:22,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:22,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:22,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:22,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:22,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:52:22,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:52:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:52:22,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:52:22,755 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-10-02 11:52:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:22,820 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-10-02 11:52:22,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:52:22,821 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-10-02 11:52:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:22,822 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:52:22,822 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:52:22,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:52:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:52:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:52:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:52:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-02 11:52:22,828 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-10-02 11:52:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:22,828 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-02 11:52:22,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:52:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-02 11:52:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:52:22,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:22,829 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-10-02 11:52:22,829 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:22,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:22,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-10-02 11:52:22,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:22,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:22,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:22,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:22,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:22,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:22,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:23,000 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:23,109 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-02 11:52:23,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:23,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:23,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:23,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-02 11:52:23,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:52:23,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:52:23,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:52:23,430 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-10-02 11:52:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:24,151 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-10-02 11:52:24,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:52:24,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-10-02 11:52:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:24,155 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:52:24,155 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 11:52:24,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:52:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 11:52:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 11:52:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:52:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-02 11:52:24,162 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-10-02 11:52:24,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:24,162 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-02 11:52:24,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:52:24,163 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-02 11:52:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:52:24,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:24,163 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-10-02 11:52:24,164 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:24,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:24,164 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-10-02 11:52:24,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:24,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:24,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:24,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:24,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:24,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:24,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:24,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:24,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:24,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:24,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:52:24,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:52:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:52:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:52:24,531 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-10-02 11:52:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:24,629 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-02 11:52:24,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:52:24,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-02 11:52:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:24,631 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:52:24,631 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:52:24,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:52:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:52:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:52:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:52:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-02 11:52:24,636 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-10-02 11:52:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:24,636 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-02 11:52:24,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:52:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-02 11:52:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:52:24,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:24,637 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-10-02 11:52:24,637 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:24,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-10-02 11:52:24,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:24,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:24,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:24,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:24,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:24,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:24,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:24,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:24,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:52:24,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:24,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:24,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:24,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:52:24,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:52:24,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:52:24,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:52:24,966 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-10-02 11:52:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:25,267 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-10-02 11:52:25,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:52:25,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-10-02 11:52:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:25,268 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:52:25,268 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:52:25,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:52:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:52:25,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:52:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:52:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-02 11:52:25,273 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-10-02 11:52:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:25,273 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-02 11:52:25,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:52:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-02 11:52:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:52:25,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:25,274 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-10-02 11:52:25,274 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:25,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-10-02 11:52:25,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:25,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:25,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:25,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:25,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:26,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:26,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:26,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:26,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:26,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:26,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:26,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:26,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:52:26,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:52:26,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:52:26,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:52:26,126 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-10-02 11:52:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:26,168 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-10-02 11:52:26,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:52:26,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-10-02 11:52:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:26,169 INFO L225 Difference]: With dead ends: 54 [2018-10-02 11:52:26,169 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:52:26,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:52:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:52:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 11:52:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:52:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-02 11:52:26,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-02 11:52:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:26,172 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-02 11:52:26,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:52:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-02 11:52:26,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:52:26,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:26,173 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-10-02 11:52:26,174 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:26,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-10-02 11:52:26,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:26,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:26,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:26,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:26,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:26,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:26,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:26,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:26,567 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:26,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:26,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:26,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:26,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:52:26,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:52:26,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:52:26,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:52:26,603 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-10-02 11:52:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:26,678 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-10-02 11:52:26,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:52:26,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-10-02 11:52:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:26,679 INFO L225 Difference]: With dead ends: 56 [2018-10-02 11:52:26,679 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 11:52:26,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:52:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 11:52:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 11:52:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:52:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-02 11:52:26,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-10-02 11:52:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:26,683 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-02 11:52:26,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:52:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-02 11:52:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:52:26,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:26,684 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-10-02 11:52:26,684 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:26,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-10-02 11:52:26,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:26,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:26,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:26,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:26,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:27,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:27,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:27,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:27,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-02 11:52:27,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:27,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:27,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:27,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-02 11:52:27,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:52:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:52:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:52:27,620 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-10-02 11:52:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:28,762 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-02 11:52:28,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:52:28,763 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-10-02 11:52:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:28,764 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:52:28,764 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:52:28,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:52:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:52:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:52:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:52:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-02 11:52:28,770 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-10-02 11:52:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:28,770 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-02 11:52:28,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:52:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-02 11:52:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:52:28,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:28,771 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-10-02 11:52:28,771 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:28,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:28,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-10-02 11:52:28,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:28,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:28,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:28,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:28,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:28,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:28,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:28,953 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:28,969 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:28,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:28,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:29,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:29,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:52:29,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:52:29,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:52:29,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:52:29,001 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-10-02 11:52:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:29,106 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-10-02 11:52:29,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:52:29,106 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-10-02 11:52:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:29,107 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:52:29,107 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:52:29,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:52:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:52:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 11:52:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:52:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-02 11:52:29,110 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-02 11:52:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:29,110 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-02 11:52:29,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:52:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-02 11:52:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:52:29,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:29,110 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-10-02 11:52:29,111 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:29,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:29,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-10-02 11:52:29,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:29,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:29,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:29,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:29,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:29,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:29,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:29,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:29,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:52:29,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:29,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:29,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:29,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:52:29,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:52:29,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:52:29,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:52:29,491 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-10-02 11:52:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:29,570 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-10-02 11:52:29,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:52:29,570 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-10-02 11:52:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:29,571 INFO L225 Difference]: With dead ends: 62 [2018-10-02 11:52:29,571 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:52:29,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:52:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:52:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 11:52:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:52:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-02 11:52:29,578 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-10-02 11:52:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:29,578 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-02 11:52:29,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:52:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-02 11:52:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:52:29,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:29,580 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-10-02 11:52:29,580 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:29,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-10-02 11:52:29,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:29,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:29,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:29,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:29,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:29,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:29,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:29,776 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:29,805 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:52:29,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:29,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:29,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:29,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:52:29,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:52:29,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:52:29,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:52:29,846 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-10-02 11:52:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:29,906 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-10-02 11:52:29,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:52:29,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-10-02 11:52:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:29,908 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:52:29,908 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:52:29,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:52:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:52:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:52:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:52:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-02 11:52:29,911 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-10-02 11:52:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:29,911 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-02 11:52:29,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:52:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-02 11:52:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:52:29,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:29,912 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-10-02 11:52:29,912 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:29,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-10-02 11:52:29,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:29,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:29,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:29,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:29,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:30,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:30,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:30,812 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:30,840 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:52:30,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:30,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:30,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:30,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:52:30,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:52:30,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:52:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:52:30,884 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-10-02 11:52:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:30,937 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-10-02 11:52:30,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:52:30,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-10-02 11:52:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:30,939 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:52:30,939 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:52:30,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:52:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:52:30,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:52:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:52:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-02 11:52:30,943 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-10-02 11:52:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:30,943 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-02 11:52:30,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:52:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-02 11:52:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 11:52:30,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:30,944 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-10-02 11:52:30,944 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:30,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-10-02 11:52:30,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:30,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:30,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:30,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:30,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:31,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:31,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:31,701 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:31,734 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-02 11:52:31,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:31,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:32,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:32,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-02 11:52:32,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:52:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:52:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:52:32,210 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-10-02 11:52:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:33,246 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-10-02 11:52:33,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:52:33,247 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-10-02 11:52:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:33,248 INFO L225 Difference]: With dead ends: 68 [2018-10-02 11:52:33,248 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 11:52:33,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:52:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 11:52:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 11:52:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:52:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-02 11:52:33,256 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-10-02 11:52:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:33,257 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-02 11:52:33,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:52:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-02 11:52:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:52:33,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:33,258 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-10-02 11:52:33,258 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:33,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:33,258 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-10-02 11:52:33,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:33,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:33,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:33,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:33,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:33,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:33,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:33,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:33,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:33,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:33,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:52:33,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:52:33,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:52:33,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:52:33,792 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-10-02 11:52:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:33,829 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-10-02 11:52:33,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:52:33,830 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-10-02 11:52:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:33,831 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:52:33,831 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:52:33,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:52:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:52:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:52:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:52:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-02 11:52:33,835 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-10-02 11:52:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:33,836 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-02 11:52:33,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:52:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-02 11:52:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:52:33,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:33,837 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-10-02 11:52:33,837 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:33,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-10-02 11:52:33,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:33,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:33,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:33,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:33,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:34,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:34,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:34,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:34,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:34,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:34,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:52:34,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:52:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:52:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:52:34,165 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-10-02 11:52:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:34,226 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-10-02 11:52:34,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:52:34,226 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-10-02 11:52:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:34,227 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:52:34,227 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:52:34,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:52:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:52:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:52:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:52:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-02 11:52:34,231 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-10-02 11:52:34,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:34,232 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-02 11:52:34,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:52:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-02 11:52:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:52:34,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:34,233 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-10-02 11:52:34,233 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:34,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:34,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-10-02 11:52:34,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:34,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:34,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:34,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:34,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:34,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:34,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:34,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:34,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:34,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:34,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:34,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:34,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:52:34,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:52:34,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:52:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:52:34,625 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-10-02 11:52:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:34,669 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-10-02 11:52:34,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:52:34,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-10-02 11:52:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:34,671 INFO L225 Difference]: With dead ends: 72 [2018-10-02 11:52:34,671 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:52:34,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:52:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:52:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 11:52:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 11:52:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-02 11:52:34,674 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-02 11:52:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:34,675 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-02 11:52:34,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:52:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-02 11:52:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:52:34,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:34,675 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-10-02 11:52:34,676 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:34,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-10-02 11:52:34,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:34,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:34,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:34,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:34,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:34,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:34,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:34,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:34,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:34,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:34,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:35,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:35,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:52:35,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:52:35,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:52:35,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:52:35,003 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-10-02 11:52:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:35,089 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-10-02 11:52:35,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:52:35,089 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-10-02 11:52:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:35,090 INFO L225 Difference]: With dead ends: 74 [2018-10-02 11:52:35,090 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 11:52:35,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:52:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 11:52:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 11:52:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:52:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-02 11:52:35,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-10-02 11:52:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:35,095 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-02 11:52:35,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:52:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-02 11:52:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:52:35,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:35,096 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-10-02 11:52:35,097 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:35,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-10-02 11:52:35,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:35,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:35,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:35,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:35,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:35,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:35,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:35,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:35,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-02 11:52:35,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:35,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:36,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:36,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-02 11:52:36,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:52:36,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:52:36,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:52:36,177 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-10-02 11:52:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:37,573 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-10-02 11:52:37,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:52:37,574 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-10-02 11:52:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:37,575 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:52:37,575 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:52:37,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:52:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:52:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:52:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:52:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-02 11:52:37,580 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-10-02 11:52:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:37,581 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-02 11:52:37,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:52:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-02 11:52:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 11:52:37,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:37,582 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-10-02 11:52:37,582 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:37,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-10-02 11:52:37,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:37,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:37,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:37,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:37,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:38,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:38,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:38,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:38,151 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:38,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:38,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:38,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:38,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-02 11:52:38,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:52:38,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:52:38,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:52:38,573 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-10-02 11:52:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:39,875 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-10-02 11:52:39,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:52:39,875 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-10-02 11:52:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:39,876 INFO L225 Difference]: With dead ends: 80 [2018-10-02 11:52:39,876 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 11:52:39,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:52:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 11:52:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 11:52:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 11:52:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-02 11:52:39,882 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-10-02 11:52:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:39,882 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-02 11:52:39,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:52:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-02 11:52:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:52:39,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:39,883 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-10-02 11:52:39,883 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:39,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-10-02 11:52:39,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:39,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:39,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:39,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:39,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:40,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:40,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:40,205 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:40,245 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 11:52:40,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:40,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:40,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:40,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:52:40,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:52:40,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:52:40,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:52:40,284 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-10-02 11:52:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:40,380 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-10-02 11:52:40,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:52:40,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-10-02 11:52:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:40,381 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:52:40,382 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:52:40,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:52:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:52:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:52:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:52:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-10-02 11:52:40,386 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-10-02 11:52:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:40,386 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-10-02 11:52:40,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:52:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-10-02 11:52:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:52:40,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:40,387 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-10-02 11:52:40,387 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:40,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:40,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-10-02 11:52:40,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:40,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:40,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:40,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:40,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:41,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:41,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:41,246 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:41,288 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-02 11:52:41,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:41,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:41,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:41,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:52:41,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:52:41,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:52:41,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:52:41,338 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-10-02 11:52:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:41,449 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-10-02 11:52:41,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:52:41,449 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-10-02 11:52:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:41,450 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:52:41,450 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:52:41,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:52:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:52:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:52:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:52:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-10-02 11:52:41,454 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-10-02 11:52:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:41,454 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-10-02 11:52:41,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:52:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-10-02 11:52:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 11:52:41,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:41,455 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-10-02 11:52:41,455 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:41,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:41,455 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-10-02 11:52:41,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:41,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:41,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:41,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:41,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:42,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:42,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:42,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:42,054 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-02 11:52:42,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:42,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:42,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:42,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-02 11:52:42,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:52:42,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:52:42,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:52:42,606 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-10-02 11:52:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:43,920 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-10-02 11:52:43,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:52:43,921 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-10-02 11:52:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:43,922 INFO L225 Difference]: With dead ends: 86 [2018-10-02 11:52:43,922 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 11:52:43,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:52:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 11:52:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 11:52:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 11:52:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-02 11:52:43,926 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-10-02 11:52:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:43,926 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-02 11:52:43,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:52:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-02 11:52:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:52:43,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:43,927 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-10-02 11:52:43,927 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:43,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-10-02 11:52:43,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:43,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:43,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:43,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:43,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:44,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:44,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:44,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:44,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:44,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:44,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:52:44,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:52:44,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:52:44,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:52:44,459 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-10-02 11:52:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:44,529 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-10-02 11:52:44,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:52:44,529 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-10-02 11:52:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:44,531 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:52:44,531 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:52:44,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:52:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:52:44,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:52:44,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:52:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-10-02 11:52:44,535 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-10-02 11:52:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:44,536 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-10-02 11:52:44,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:52:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-10-02 11:52:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:52:44,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:44,537 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-10-02 11:52:44,537 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:44,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-10-02 11:52:44,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:44,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:44,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:44,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:44,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:44,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:44,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:44,890 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:44,914 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:44,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:44,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:44,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:44,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:52:44,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:52:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:52:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:52:44,947 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-10-02 11:52:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:45,003 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-10-02 11:52:45,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:52:45,004 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-10-02 11:52:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:45,005 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:52:45,005 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:52:45,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:52:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:52:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:52:45,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:52:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-02 11:52:45,009 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-10-02 11:52:45,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:45,010 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-02 11:52:45,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:52:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-02 11:52:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:52:45,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:45,010 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-10-02 11:52:45,011 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:45,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-10-02 11:52:45,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:45,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:45,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:45,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:45,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:45,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:45,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:45,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:45,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:45,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:45,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:45,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:52:45,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:52:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:52:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:52:45,440 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-10-02 11:52:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:45,509 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-10-02 11:52:45,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:52:45,509 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-10-02 11:52:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:45,510 INFO L225 Difference]: With dead ends: 90 [2018-10-02 11:52:45,511 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 11:52:45,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:52:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 11:52:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 11:52:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 11:52:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-02 11:52:45,515 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-02 11:52:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:45,515 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-02 11:52:45,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:52:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-02 11:52:45,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:52:45,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:45,516 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-10-02 11:52:45,516 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:45,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:45,516 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-10-02 11:52:45,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:45,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:45,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:45,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:45,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:45,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:45,968 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:46,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 11:52:46,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:46,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:46,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:46,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:52:46,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:52:46,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:52:46,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:52:46,055 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-10-02 11:52:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:46,099 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-10-02 11:52:46,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:52:46,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-10-02 11:52:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:46,101 INFO L225 Difference]: With dead ends: 92 [2018-10-02 11:52:46,101 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 11:52:46,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:52:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 11:52:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 11:52:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 11:52:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-02 11:52:46,105 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-10-02 11:52:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:46,106 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-02 11:52:46,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:52:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-02 11:52:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:52:46,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:46,107 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-10-02 11:52:46,107 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:46,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-10-02 11:52:46,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:46,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:46,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:46,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:46,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:46,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:46,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:46,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:46,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-02 11:52:46,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:46,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:47,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:47,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-02 11:52:47,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:52:47,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:52:47,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:52:47,581 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-10-02 11:52:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:49,309 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-10-02 11:52:49,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:52:49,310 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-10-02 11:52:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:49,311 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:52:49,311 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:52:49,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-10-02 11:52:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:52:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:52:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:52:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-02 11:52:49,317 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-02 11:52:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:49,317 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-02 11:52:49,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:52:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-02 11:52:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 11:52:49,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:49,318 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-10-02 11:52:49,319 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:49,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-10-02 11:52:49,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:49,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:49,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:49,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:49,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:49,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:49,769 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:49,795 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:49,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:49,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:49,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:49,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:52:49,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:52:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:52:49,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:52:49,830 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-10-02 11:52:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:49,936 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-10-02 11:52:49,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:52:49,936 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-10-02 11:52:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:49,937 INFO L225 Difference]: With dead ends: 96 [2018-10-02 11:52:49,937 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 11:52:49,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:52:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 11:52:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 11:52:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 11:52:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-02 11:52:49,941 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-02 11:52:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:49,941 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-02 11:52:49,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:52:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-02 11:52:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 11:52:49,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:49,942 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-10-02 11:52:49,942 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:49,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-10-02 11:52:49,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:49,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:49,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:49,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:50,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:50,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:50,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:50,434 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-02 11:52:50,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:50,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:50,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:50,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:52:50,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:52:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:52:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:52:50,484 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-10-02 11:52:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:51,222 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-10-02 11:52:51,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:52:51,223 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-10-02 11:52:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:51,224 INFO L225 Difference]: With dead ends: 98 [2018-10-02 11:52:51,224 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 11:52:51,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:52:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 11:52:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 11:52:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:52:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-02 11:52:51,229 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-10-02 11:52:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:51,231 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-02 11:52:51,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:52:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-02 11:52:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:52:51,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:51,232 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-10-02 11:52:51,232 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:51,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:51,232 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-10-02 11:52:51,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:51,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:51,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:51,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:51,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:52,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:52,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:52,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:52,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-02 11:52:52,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:52,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:52,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:52,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:52:52,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:52:52,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:52:52,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:52:52,455 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-10-02 11:52:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:52,551 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-10-02 11:52:52,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:52:52,552 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-10-02 11:52:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:52,552 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:52:52,553 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:52:52,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:52:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:52:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:52:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:52:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-02 11:52:52,556 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-10-02 11:52:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:52,557 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-02 11:52:52,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:52:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-02 11:52:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:52:52,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:52,558 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-10-02 11:52:52,558 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:52,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-10-02 11:52:52,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:52,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:52,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:52,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:52,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:53,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:53,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:53,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:53,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:53,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:53,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:52:53,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:52:53,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:52:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:52:53,388 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-10-02 11:52:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:53,460 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-10-02 11:52:53,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:52:53,460 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-10-02 11:52:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:53,462 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:52:53,462 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:52:53,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:52:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:52:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:52:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:52:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-10-02 11:52:53,466 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-10-02 11:52:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:53,467 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-10-02 11:52:53,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:52:53,467 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-10-02 11:52:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 11:52:53,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:53,468 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-10-02 11:52:53,468 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:53,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-10-02 11:52:53,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:53,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:53,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:53,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:53,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:54,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:54,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:54,271 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:54,321 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-02 11:52:54,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:54,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:55,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:55,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-02 11:52:55,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:52:55,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:52:55,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:52:55,212 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-10-02 11:52:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:57,472 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-10-02 11:52:57,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:52:57,472 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-10-02 11:52:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:57,474 INFO L225 Difference]: With dead ends: 104 [2018-10-02 11:52:57,474 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 11:52:57,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-10-02 11:52:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 11:52:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 11:52:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 11:52:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-02 11:52:57,480 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-10-02 11:52:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:57,480 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-02 11:52:57,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:52:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-02 11:52:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:52:57,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:57,481 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-10-02 11:52:57,481 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:57,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:57,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-10-02 11:52:57,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:57,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:57,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:57,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:57,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:58,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:58,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:58,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:58,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:58,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:58,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:52:58,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:52:58,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:52:58,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:52:58,241 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-10-02 11:52:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:58,540 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-10-02 11:52:58,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:52:58,540 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-10-02 11:52:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:58,541 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:52:58,542 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:52:58,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:52:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:52:58,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:52:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:52:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-02 11:52:58,546 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-10-02 11:52:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:58,547 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-02 11:52:58,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:52:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-02 11:52:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:52:58,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:58,548 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-10-02 11:52:58,548 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:58,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-10-02 11:52:58,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:58,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:58,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:58,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:58,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:59,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:59,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:59,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:59,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:59,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:59,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:59,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:59,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:52:59,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:52:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:52:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:52:59,802 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-10-02 11:52:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:59,878 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-10-02 11:52:59,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:52:59,878 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-10-02 11:52:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:59,879 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:52:59,879 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:52:59,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:52:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:52:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:52:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:52:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-10-02 11:52:59,884 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-10-02 11:52:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:59,884 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-10-02 11:52:59,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:52:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-10-02 11:52:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 11:52:59,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:59,885 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-10-02 11:52:59,885 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:59,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:59,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-10-02 11:52:59,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:59,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:59,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:59,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:59,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:00,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:00,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:00,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:00,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:00,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:00,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:00,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:00,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:53:00,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:53:00,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:53:00,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:53:00,580 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-10-02 11:53:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:00,736 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-10-02 11:53:00,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:53:00,736 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-10-02 11:53:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:00,737 INFO L225 Difference]: With dead ends: 108 [2018-10-02 11:53:00,738 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 11:53:00,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:53:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 11:53:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 11:53:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 11:53:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-02 11:53:00,743 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-02 11:53:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:00,743 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-02 11:53:00,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:53:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-02 11:53:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 11:53:00,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:00,744 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-10-02 11:53:00,744 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:00,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-10-02 11:53:00,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:00,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:00,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:00,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:00,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:01,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:01,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:01,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:01,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:53:01,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:01,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:01,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:01,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:53:01,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:53:01,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:53:01,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:53:01,895 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-10-02 11:53:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:02,083 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-10-02 11:53:02,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:53:02,083 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-10-02 11:53:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:02,084 INFO L225 Difference]: With dead ends: 110 [2018-10-02 11:53:02,084 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 11:53:02,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:53:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 11:53:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 11:53:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 11:53:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-02 11:53:02,089 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-10-02 11:53:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:02,089 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-02 11:53:02,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:53:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-02 11:53:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:53:02,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:02,090 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-10-02 11:53:02,090 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:02,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-10-02 11:53:02,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:02,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:02,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:02,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:02,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:02,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:02,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:02,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:02,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-10-02 11:53:02,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:02,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:03,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:03,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-02 11:53:03,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:53:03,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:53:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:53:03,651 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-10-02 11:53:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:05,944 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-10-02 11:53:05,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:53:05,945 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-10-02 11:53:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:05,946 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:53:05,946 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 11:53:05,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-10-02 11:53:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 11:53:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 11:53:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:53:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-10-02 11:53:05,951 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-10-02 11:53:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:05,951 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-10-02 11:53:05,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:53:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-10-02 11:53:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 11:53:05,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:05,952 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-10-02 11:53:05,952 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:05,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:05,952 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-10-02 11:53:05,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:05,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:05,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:05,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:05,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:06,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:06,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:06,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:06,622 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:06,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:06,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:06,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:06,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:53:06,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:53:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:53:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:53:06,659 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-10-02 11:53:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:06,742 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-10-02 11:53:06,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:53:06,742 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-10-02 11:53:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:06,743 INFO L225 Difference]: With dead ends: 114 [2018-10-02 11:53:06,743 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 11:53:06,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:53:06,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 11:53:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-02 11:53:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 11:53:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-02 11:53:06,748 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-02 11:53:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:06,749 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-02 11:53:06,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:53:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-02 11:53:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 11:53:06,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:06,749 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-10-02 11:53:06,750 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:06,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-10-02 11:53:06,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:06,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:06,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:06,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:06,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:08,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:08,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:08,790 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:08,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:08,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:08,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:53:08,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:53:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:53:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:53:08,827 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-10-02 11:53:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:08,895 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-02 11:53:08,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:53:08,896 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-10-02 11:53:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:08,897 INFO L225 Difference]: With dead ends: 116 [2018-10-02 11:53:08,897 INFO L226 Difference]: Without dead ends: 112 [2018-10-02 11:53:08,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:53:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-02 11:53:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-02 11:53:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 11:53:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-02 11:53:08,901 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-02 11:53:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:08,901 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-02 11:53:08,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:53:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-02 11:53:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:53:08,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:08,902 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-10-02 11:53:08,903 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:08,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-10-02 11:53:08,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:08,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:08,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:08,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:10,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:10,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:10,475 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:10,869 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-02 11:53:10,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:10,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:10,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:10,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:53:10,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:53:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:53:10,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:53:10,918 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-10-02 11:53:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:11,018 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-10-02 11:53:11,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:53:11,018 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-10-02 11:53:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:11,019 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:53:11,019 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:53:11,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:53:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:53:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 11:53:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 11:53:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-10-02 11:53:11,024 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-10-02 11:53:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:11,024 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-10-02 11:53:11,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:53:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-10-02 11:53:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:53:11,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:11,025 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-10-02 11:53:11,025 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:11,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:11,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-10-02 11:53:11,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:11,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:11,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:11,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:11,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:11,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:11,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:11,706 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-02 11:53:11,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:11,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:11,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:11,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:53:11,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:53:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:53:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:53:11,749 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-10-02 11:53:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:11,864 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-10-02 11:53:11,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:53:11,865 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-10-02 11:53:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:11,866 INFO L225 Difference]: With dead ends: 119 [2018-10-02 11:53:11,866 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:53:11,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:53:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:53:11,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 11:53:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:53:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-02 11:53:11,870 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-10-02 11:53:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:11,870 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-02 11:53:11,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:53:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-02 11:53:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 11:53:11,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:11,871 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-10-02 11:53:11,871 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:11,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-10-02 11:53:11,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:11,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:11,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:11,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:12,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:12,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:12,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:13,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-02 11:53:13,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:13,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:14,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:14,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-02 11:53:14,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:53:14,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:53:14,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:53:14,279 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-10-02 11:53:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:16,911 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-10-02 11:53:16,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:53:16,911 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-10-02 11:53:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:16,912 INFO L225 Difference]: With dead ends: 122 [2018-10-02 11:53:16,912 INFO L226 Difference]: Without dead ends: 118 [2018-10-02 11:53:16,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-10-02 11:53:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-02 11:53:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-02 11:53:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-02 11:53:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-02 11:53:16,918 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-10-02 11:53:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:16,918 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-02 11:53:16,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:53:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-02 11:53:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 11:53:16,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:16,919 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-10-02 11:53:16,919 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:16,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:16,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-10-02 11:53:16,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:16,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:16,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:16,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:16,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:19,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:19,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:19,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:19,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:19,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:19,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:53:19,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:53:19,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:53:19,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:53:19,649 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-10-02 11:53:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:19,737 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-10-02 11:53:19,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:53:19,738 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-10-02 11:53:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:19,739 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:53:19,739 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:53:19,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:53:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:53:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-02 11:53:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:53:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-02 11:53:19,744 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-10-02 11:53:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:19,745 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-02 11:53:19,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:53:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-02 11:53:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 11:53:19,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:19,746 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-10-02 11:53:19,746 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:19,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-10-02 11:53:19,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:19,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:19,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:19,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:19,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:21,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:21,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:21,150 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:21,226 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-02 11:53:21,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:21,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:21,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:21,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:53:21,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:53:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:53:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:53:21,282 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-10-02 11:53:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:21,405 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-10-02 11:53:21,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:53:21,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-10-02 11:53:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:21,407 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:53:21,407 INFO L226 Difference]: Without dead ends: 121 [2018-10-02 11:53:21,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:53:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-02 11:53:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-02 11:53:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-02 11:53:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-02 11:53:21,413 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-10-02 11:53:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:21,413 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-02 11:53:21,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:53:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-02 11:53:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-02 11:53:21,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:21,414 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-10-02 11:53:21,414 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:21,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-10-02 11:53:21,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:21,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:21,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:21,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:21,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:22,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:22,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:22,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:22,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:22,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:22,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:22,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:22,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:53:22,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:53:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:53:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:53:22,160 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-10-02 11:53:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:22,256 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-10-02 11:53:22,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:53:22,256 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-10-02 11:53:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:22,257 INFO L225 Difference]: With dead ends: 126 [2018-10-02 11:53:22,257 INFO L226 Difference]: Without dead ends: 122 [2018-10-02 11:53:22,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:53:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-02 11:53:22,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-02 11:53:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-02 11:53:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-02 11:53:22,263 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-10-02 11:53:22,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:22,263 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-02 11:53:22,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:53:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-02 11:53:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-02 11:53:22,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:22,264 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-10-02 11:53:22,264 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:22,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:22,265 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-10-02 11:53:22,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:22,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:22,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:22,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:22,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:23,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:23,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:23,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:23,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:23,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:23,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:53:23,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:53:23,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:53:23,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:53:23,301 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-10-02 11:53:23,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:23,415 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-10-02 11:53:23,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:53:23,415 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-10-02 11:53:23,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:23,416 INFO L225 Difference]: With dead ends: 128 [2018-10-02 11:53:23,416 INFO L226 Difference]: Without dead ends: 124 [2018-10-02 11:53:23,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:53:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-02 11:53:23,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-02 11:53:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-02 11:53:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-10-02 11:53:23,421 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-10-02 11:53:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:23,421 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-10-02 11:53:23,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:53:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-10-02 11:53:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:53:23,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:23,422 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-10-02 11:53:23,422 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:23,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:23,422 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-10-02 11:53:23,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:23,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:23,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:23,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:23,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:24,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:24,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:24,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:24,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-02 11:53:24,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:24,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:25,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:25,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-02 11:53:25,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:53:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:53:25,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:53:25,687 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-10-02 11:53:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:29,085 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-10-02 11:53:29,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:53:29,085 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-10-02 11:53:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:29,086 INFO L225 Difference]: With dead ends: 131 [2018-10-02 11:53:29,087 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:53:29,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-10-02 11:53:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:53:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-02 11:53:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:53:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-10-02 11:53:29,092 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-10-02 11:53:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:29,092 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-10-02 11:53:29,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:53:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-10-02 11:53:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-02 11:53:29,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:29,093 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-10-02 11:53:29,093 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:29,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-10-02 11:53:29,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:29,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:29,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:29,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:29,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:29,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:29,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:29,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:29,778 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:29,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:29,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:29,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:29,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:53:29,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:53:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:53:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:53:29,828 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-10-02 11:53:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:29,900 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-10-02 11:53:29,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:53:29,901 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-10-02 11:53:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:29,902 INFO L225 Difference]: With dead ends: 132 [2018-10-02 11:53:29,902 INFO L226 Difference]: Without dead ends: 128 [2018-10-02 11:53:29,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:53:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-02 11:53:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-02 11:53:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-02 11:53:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-10-02 11:53:29,907 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-10-02 11:53:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:29,908 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-10-02 11:53:29,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:53:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-10-02 11:53:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-02 11:53:29,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:29,909 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-10-02 11:53:29,909 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:29,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-10-02 11:53:29,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:29,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:29,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:29,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:29,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:30,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:30,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:30,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:30,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:30,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:30,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:30,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:30,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:53:30,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:53:30,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:53:30,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:53:30,739 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-10-02 11:53:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:32,226 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-10-02 11:53:32,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:53:32,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-10-02 11:53:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:32,227 INFO L225 Difference]: With dead ends: 134 [2018-10-02 11:53:32,228 INFO L226 Difference]: Without dead ends: 130 [2018-10-02 11:53:32,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:53:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-02 11:53:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-02 11:53:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-02 11:53:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-02 11:53:32,231 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-10-02 11:53:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:32,232 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-02 11:53:32,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:53:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-02 11:53:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:53:32,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:32,233 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-10-02 11:53:32,233 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:32,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-10-02 11:53:32,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:32,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:32,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:32,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:32,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:33,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:33,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:33,293 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:33,366 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-02 11:53:33,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:33,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:33,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:33,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:53:33,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:53:33,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:53:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:53:33,426 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-10-02 11:53:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:33,562 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-10-02 11:53:33,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:53:33,562 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-10-02 11:53:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:33,563 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:53:33,564 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:53:33,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:53:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:53:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-02 11:53:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:53:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-02 11:53:33,568 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-10-02 11:53:33,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:33,568 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-02 11:53:33,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:53:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-02 11:53:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:53:33,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:33,569 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-10-02 11:53:33,569 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:33,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-10-02 11:53:33,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:33,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:33,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:34,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:34,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:34,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:34,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-10-02 11:53:34,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:34,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:34,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:34,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:53:34,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:53:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:53:34,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:53:34,472 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-10-02 11:53:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:34,575 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-10-02 11:53:34,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:53:34,575 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-10-02 11:53:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:34,576 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:53:34,576 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 11:53:34,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:53:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 11:53:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-02 11:53:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 11:53:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-02 11:53:34,580 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-02 11:53:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:34,580 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-02 11:53:34,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:53:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-02 11:53:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-02 11:53:34,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:34,581 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-10-02 11:53:34,581 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:34,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-10-02 11:53:34,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:34,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:34,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:34,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:34,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:35,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:35,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:35,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:35,383 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-02 11:53:35,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:35,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:36,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:36,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-02 11:53:36,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 11:53:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 11:53:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:53:36,936 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-10-02 11:53:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:40,749 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-10-02 11:53:40,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:53:40,750 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-10-02 11:53:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:40,751 INFO L225 Difference]: With dead ends: 140 [2018-10-02 11:53:40,751 INFO L226 Difference]: Without dead ends: 136 [2018-10-02 11:53:40,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-10-02 11:53:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-02 11:53:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-02 11:53:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-02 11:53:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-02 11:53:40,757 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-10-02 11:53:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:40,757 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-02 11:53:40,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 11:53:40,757 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-02 11:53:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:53:40,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:40,758 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-10-02 11:53:40,758 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:40,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:40,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-10-02 11:53:40,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:40,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:40,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:40,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:40,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:41,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:41,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:41,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:41,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:41,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:41,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:53:41,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:53:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:53:41,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:53:41,619 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-10-02 11:53:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:41,699 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-10-02 11:53:41,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:53:41,700 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-10-02 11:53:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:41,701 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:53:41,701 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 11:53:41,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:53:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 11:53:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-02 11:53:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-02 11:53:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-10-02 11:53:41,705 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-10-02 11:53:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:41,705 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-10-02 11:53:41,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:53:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-10-02 11:53:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:53:41,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:41,706 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-10-02 11:53:41,706 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:41,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-10-02 11:53:41,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:41,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:41,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:41,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:41,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:42,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:42,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:42,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:42,708 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:42,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:42,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:42,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:42,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:53:42,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:53:42,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:53:42,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:53:42,751 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-10-02 11:53:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:42,820 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-10-02 11:53:42,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:53:42,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-10-02 11:53:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:42,822 INFO L225 Difference]: With dead ends: 143 [2018-10-02 11:53:42,822 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:53:42,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:53:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:53:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-02 11:53:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:53:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-10-02 11:53:42,826 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-10-02 11:53:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:42,826 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-10-02 11:53:42,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:53:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-10-02 11:53:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-02 11:53:42,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:42,827 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-10-02 11:53:42,827 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:42,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:42,827 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-10-02 11:53:42,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:42,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:42,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:42,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:42,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:43,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:43,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:43,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:43,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:43,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:43,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:44,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:44,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:53:44,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:53:44,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:53:44,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:53:44,002 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-10-02 11:53:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:44,262 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-10-02 11:53:44,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:53:44,263 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-10-02 11:53:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:44,264 INFO L225 Difference]: With dead ends: 144 [2018-10-02 11:53:44,264 INFO L226 Difference]: Without dead ends: 140 [2018-10-02 11:53:44,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:53:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-02 11:53:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-02 11:53:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-02 11:53:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-02 11:53:44,270 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-10-02 11:53:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:44,271 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-02 11:53:44,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:53:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-02 11:53:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-02 11:53:44,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:44,272 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-10-02 11:53:44,272 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:44,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:44,272 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-10-02 11:53:44,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:44,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:44,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:44,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:44,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:45,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:45,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:45,128 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:45,207 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-02 11:53:45,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:45,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:45,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:45,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:53:45,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:53:45,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:53:45,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:53:45,252 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-10-02 11:53:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:45,365 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-10-02 11:53:45,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:53:45,366 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-10-02 11:53:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:45,367 INFO L225 Difference]: With dead ends: 146 [2018-10-02 11:53:45,367 INFO L226 Difference]: Without dead ends: 142 [2018-10-02 11:53:45,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:53:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-02 11:53:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-02 11:53:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-02 11:53:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-10-02 11:53:45,372 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-10-02 11:53:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:45,373 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-10-02 11:53:45,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:53:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-10-02 11:53:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 11:53:45,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:45,374 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-10-02 11:53:45,374 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:45,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:45,374 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-10-02 11:53:45,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:45,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:45,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:45,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:45,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:46,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:46,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:46,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:46,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-10-02 11:53:46,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:46,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:46,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:46,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:53:46,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:53:46,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:53:46,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:53:46,485 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-10-02 11:53:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:46,560 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-10-02 11:53:46,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:53:46,560 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-10-02 11:53:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:46,564 INFO L225 Difference]: With dead ends: 147 [2018-10-02 11:53:46,565 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:53:46,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:53:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:53:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-02 11:53:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:53:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-02 11:53:46,570 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-10-02 11:53:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:46,570 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-02 11:53:46,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:53:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-02 11:53:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 11:53:46,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:46,571 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-10-02 11:53:46,572 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:46,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:46,572 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-10-02 11:53:46,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:46,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:46,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:46,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:47,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:47,465 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:47,560 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-02 11:53:47,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:47,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:47,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:47,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:53:47,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:53:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:53:47,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:53:47,626 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-10-02 11:53:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:48,334 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-02 11:53:48,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:53:48,335 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-10-02 11:53:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:48,336 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:53:48,336 INFO L226 Difference]: Without dead ends: 145 [2018-10-02 11:53:48,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:53:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-02 11:53:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-02 11:53:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-02 11:53:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-02 11:53:48,341 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-10-02 11:53:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:48,341 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-02 11:53:48,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:53:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-02 11:53:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-02 11:53:48,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:48,343 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-10-02 11:53:48,343 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:48,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-10-02 11:53:48,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:48,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:49,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:49,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:49,361 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:49,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:49,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:51,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-02 11:53:51,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-02 11:53:51,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-02 11:53:51,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:53:51,153 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-10-02 11:53:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:55,827 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-10-02 11:53:55,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 11:53:55,828 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-10-02 11:53:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:55,828 INFO L225 Difference]: With dead ends: 152 [2018-10-02 11:53:55,828 INFO L226 Difference]: Without dead ends: 148 [2018-10-02 11:53:55,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-10-02 11:53:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-02 11:53:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-02 11:53:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-02 11:53:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-10-02 11:53:55,833 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-10-02 11:53:55,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:55,834 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-10-02 11:53:55,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-02 11:53:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-10-02 11:53:55,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:53:55,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:55,835 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-10-02 11:53:55,835 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:55,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-10-02 11:53:55,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:55,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:55,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:55,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:56,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:56,799 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:56,881 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-02 11:53:56,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:56,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:56,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:56,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:53:56,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:53:56,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:53:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:53:56,944 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-10-02 11:53:57,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:57,050 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-10-02 11:53:57,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:53:57,050 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-10-02 11:53:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:57,051 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:53:57,051 INFO L226 Difference]: Without dead ends: 149 [2018-10-02 11:53:57,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:53:57,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-02 11:53:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-02 11:53:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-02 11:53:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-10-02 11:53:57,056 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-10-02 11:53:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:57,056 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-10-02 11:53:57,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:53:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-10-02 11:53:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:53:57,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:57,056 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-10-02 11:53:57,057 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:57,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-10-02 11:53:57,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:57,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:57,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:57,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:57,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:57,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:58,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:58,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:53:58,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:53:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:53:58,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:53:58,076 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-10-02 11:53:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:58,201 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-10-02 11:53:58,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:53:58,202 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-10-02 11:53:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:58,203 INFO L225 Difference]: With dead ends: 155 [2018-10-02 11:53:58,203 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 11:53:58,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:53:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 11:53:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-02 11:53:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 11:53:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-02 11:53:58,207 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-10-02 11:53:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:58,207 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-02 11:53:58,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:53:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-02 11:53:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-02 11:53:58,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:58,208 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-10-02 11:53:58,208 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:58,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:58,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-10-02 11:53:58,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:58,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:58,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:58,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:59,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:59,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:59,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:59,510 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-02 11:53:59,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:59,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:01,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-02 11:54:01,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-02 11:54:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-02 11:54:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:54:01,350 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-10-02 11:54:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:06,095 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-10-02 11:54:06,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-02 11:54:06,095 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-10-02 11:54:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:06,096 INFO L225 Difference]: With dead ends: 158 [2018-10-02 11:54:06,096 INFO L226 Difference]: Without dead ends: 154 [2018-10-02 11:54:06,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-10-02 11:54:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-02 11:54:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-02 11:54:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-02 11:54:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-10-02 11:54:06,101 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-10-02 11:54:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:06,101 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-10-02 11:54:06,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-02 11:54:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-10-02 11:54:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-02 11:54:06,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:06,103 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-10-02 11:54:06,103 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:06,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-10-02 11:54:06,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:06,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:06,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:06,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:07,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:07,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:07,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:07,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:54:07,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:54:07,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:54:07,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:54:07,122 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-10-02 11:54:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:07,629 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-10-02 11:54:07,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:54:07,629 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-10-02 11:54:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:07,630 INFO L225 Difference]: With dead ends: 159 [2018-10-02 11:54:07,630 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:54:07,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:54:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:54:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-02 11:54:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 11:54:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-02 11:54:07,636 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-10-02 11:54:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:07,636 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-02 11:54:07,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:54:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-02 11:54:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-02 11:54:07,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:07,637 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-10-02 11:54:07,638 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:07,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-10-02 11:54:07,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:07,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:07,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:07,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:08,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:08,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:08,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:08,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:08,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:08,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:08,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:54:08,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:54:08,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:54:08,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:54:08,963 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-10-02 11:54:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:09,074 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-10-02 11:54:09,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:54:09,074 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-10-02 11:54:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:09,075 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:54:09,076 INFO L226 Difference]: Without dead ends: 157 [2018-10-02 11:54:09,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:54:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-02 11:54:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-02 11:54:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-02 11:54:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-02 11:54:09,080 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-10-02 11:54:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:09,081 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-02 11:54:09,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:54:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-02 11:54:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-02 11:54:09,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:09,082 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-10-02 11:54:09,082 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:09,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:09,082 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-10-02 11:54:09,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:09,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:09,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:09,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:10,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:10,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:10,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:10,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:10,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:10,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:10,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:10,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:54:10,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:54:10,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:54:10,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:54:10,251 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-10-02 11:54:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:10,404 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-10-02 11:54:10,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:54:10,404 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-10-02 11:54:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:10,405 INFO L225 Difference]: With dead ends: 162 [2018-10-02 11:54:10,405 INFO L226 Difference]: Without dead ends: 158 [2018-10-02 11:54:10,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:54:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-02 11:54:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-02 11:54:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-02 11:54:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-10-02 11:54:10,410 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-10-02 11:54:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:10,410 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-10-02 11:54:10,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:54:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-10-02 11:54:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-02 11:54:10,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:10,411 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-10-02 11:54:10,411 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:10,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-10-02 11:54:10,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:10,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:10,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:10,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:11,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:11,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:11,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:54:11,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:11,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:11,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:54:11,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:54:11,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:54:11,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:54:11,593 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-10-02 11:54:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:11,731 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-10-02 11:54:11,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:54:11,732 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-10-02 11:54:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:11,732 INFO L225 Difference]: With dead ends: 164 [2018-10-02 11:54:11,732 INFO L226 Difference]: Without dead ends: 160 [2018-10-02 11:54:11,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:54:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-02 11:54:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-02 11:54:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-02 11:54:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-02 11:54:11,736 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-10-02 11:54:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:11,737 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-02 11:54:11,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:54:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-02 11:54:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 11:54:11,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:11,738 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-10-02 11:54:11,738 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:11,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:11,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-10-02 11:54:11,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:11,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:11,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:11,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:12,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:12,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:12,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:12,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-10-02 11:54:12,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:12,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:15,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:15,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-02 11:54:15,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-02 11:54:15,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-02 11:54:15,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:54:15,179 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-10-02 11:54:20,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:20,484 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-10-02 11:54:20,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-02 11:54:20,484 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-10-02 11:54:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:20,485 INFO L225 Difference]: With dead ends: 167 [2018-10-02 11:54:20,486 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 11:54:20,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-10-02 11:54:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 11:54:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-02 11:54:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-02 11:54:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-10-02 11:54:20,491 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-10-02 11:54:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:20,491 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-10-02 11:54:20,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-02 11:54:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-10-02 11:54:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-02 11:54:20,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:20,493 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-10-02 11:54:20,493 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:20,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-10-02 11:54:20,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:20,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:20,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:20,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:21,526 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 [2018-10-02 11:54:21,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:21,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:21,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:21,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:21,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:54:21,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:54:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:54:21,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:54:21,638 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-10-02 11:54:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:22,120 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-10-02 11:54:22,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:54:22,120 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-10-02 11:54:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:22,121 INFO L225 Difference]: With dead ends: 168 [2018-10-02 11:54:22,121 INFO L226 Difference]: Without dead ends: 164 [2018-10-02 11:54:22,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:54:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-02 11:54:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-02 11:54:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-02 11:54:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-02 11:54:22,125 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-10-02 11:54:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:22,125 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-02 11:54:22,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:54:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-02 11:54:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-02 11:54:22,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:22,126 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-10-02 11:54:22,126 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:22,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:22,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-10-02 11:54:22,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:22,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:22,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:22,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:22,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:23,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:23,235 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 [2018-10-02 11:54:23,242 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:23,288 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:23,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:23,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:23,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:23,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:54:23,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:54:23,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:54:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:54:23,334 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-10-02 11:54:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:23,481 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-10-02 11:54:23,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:54:23,482 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-10-02 11:54:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:23,483 INFO L225 Difference]: With dead ends: 170 [2018-10-02 11:54:23,483 INFO L226 Difference]: Without dead ends: 166 [2018-10-02 11:54:23,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:54:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-02 11:54:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-02 11:54:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-02 11:54:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-02 11:54:23,487 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-10-02 11:54:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:23,487 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-02 11:54:23,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:54:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-02 11:54:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-02 11:54:23,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:23,488 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-10-02 11:54:23,489 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:23,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:23,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-10-02 11:54:23,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:23,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:23,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:23,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:23,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:24,816 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 [2018-10-02 11:54:24,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:24,921 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-02 11:54:24,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:24,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:24,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:54:24,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:54:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:54:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:54:24,973 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-10-02 11:54:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:25,064 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-10-02 11:54:25,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:54:25,065 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-10-02 11:54:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:25,066 INFO L225 Difference]: With dead ends: 171 [2018-10-02 11:54:25,066 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 11:54:25,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:54:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 11:54:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-02 11:54:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 11:54:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-10-02 11:54:25,071 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-10-02 11:54:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:25,071 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-10-02 11:54:25,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:54:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-10-02 11:54:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-02 11:54:25,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:25,073 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-10-02 11:54:25,073 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:25,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-10-02 11:54:25,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:25,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:25,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:25,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:25,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:26,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:26,259 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 [2018-10-02 11:54:26,267 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:26,368 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-02 11:54:26,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:26,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:26,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:26,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:54:26,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:54:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:54:26,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:54:26,436 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-10-02 11:54:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:26,732 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-02 11:54:26,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:54:26,733 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-10-02 11:54:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:26,734 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:54:26,734 INFO L226 Difference]: Without dead ends: 169 [2018-10-02 11:54:26,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:54:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-02 11:54:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-02 11:54:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-02 11:54:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-10-02 11:54:26,737 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-10-02 11:54:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:26,737 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-10-02 11:54:26,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:54:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-10-02 11:54:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-02 11:54:26,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:26,738 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-10-02 11:54:26,739 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:26,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-10-02 11:54:26,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:26,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:26,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:26,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:27,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:27,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:27,896 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:27,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-02 11:54:27,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:27,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:30,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:30,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-02 11:54:30,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-02 11:54:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-02 11:54:30,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-10-02 11:54:30,566 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-10-02 11:54:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:36,530 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-10-02 11:54:36,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-02 11:54:36,530 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-10-02 11:54:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:36,531 INFO L225 Difference]: With dead ends: 176 [2018-10-02 11:54:36,531 INFO L226 Difference]: Without dead ends: 172 [2018-10-02 11:54:36,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-10-02 11:54:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-02 11:54:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-10-02 11:54:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-02 11:54:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-10-02 11:54:36,537 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-10-02 11:54:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:36,537 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-10-02 11:54:36,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-02 11:54:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-10-02 11:54:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 11:54:36,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:36,538 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-10-02 11:54:36,539 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:36,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:36,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-10-02 11:54:36,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:36,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:36,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:36,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:38,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:38,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:38,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:54:38,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:54:38,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:54:38,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:54:38,399 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-10-02 11:54:38,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:38,549 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-10-02 11:54:38,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:54:38,550 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-10-02 11:54:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:38,551 INFO L225 Difference]: With dead ends: 177 [2018-10-02 11:54:38,551 INFO L226 Difference]: Without dead ends: 173 [2018-10-02 11:54:38,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:54:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-02 11:54:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-02 11:54:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-02 11:54:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-10-02 11:54:38,555 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-10-02 11:54:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:38,555 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-10-02 11:54:38,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:54:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-10-02 11:54:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 11:54:38,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:38,556 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-10-02 11:54:38,556 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:38,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-10-02 11:54:38,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:38,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:38,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:38,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:40,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:40,094 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:40,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-10-02 11:54:40,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:40,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:40,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:54:40,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:54:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:54:40,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:54:40,258 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-10-02 11:54:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:40,419 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-10-02 11:54:40,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:54:40,419 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-10-02 11:54:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:40,421 INFO L225 Difference]: With dead ends: 179 [2018-10-02 11:54:40,421 INFO L226 Difference]: Without dead ends: 175 [2018-10-02 11:54:40,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:54:40,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-02 11:54:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-02 11:54:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-02 11:54:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-02 11:54:40,424 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-02 11:54:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:40,424 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-02 11:54:40,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:54:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-02 11:54:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-02 11:54:40,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:40,425 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-10-02 11:54:40,425 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:40,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:40,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-10-02 11:54:40,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:40,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:40,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:40,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:40,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:41,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:41,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:41,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:41,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:41,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:41,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:54:41,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:54:41,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:54:41,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:54:41,796 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-10-02 11:54:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:41,956 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-10-02 11:54:41,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:54:41,957 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-10-02 11:54:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:41,958 INFO L225 Difference]: With dead ends: 180 [2018-10-02 11:54:41,958 INFO L226 Difference]: Without dead ends: 176 [2018-10-02 11:54:41,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:54:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-02 11:54:41,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-02 11:54:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-02 11:54:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-02 11:54:41,961 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-10-02 11:54:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:41,962 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-02 11:54:41,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:54:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-02 11:54:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-02 11:54:41,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:41,962 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-10-02 11:54:41,963 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:41,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-10-02 11:54:41,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:41,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:41,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:41,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:43,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:43,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:54:43,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:54:43,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:54:43,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:54:43,285 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-10-02 11:54:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:43,401 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-10-02 11:54:43,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:54:43,401 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-10-02 11:54:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:43,403 INFO L225 Difference]: With dead ends: 182 [2018-10-02 11:54:43,403 INFO L226 Difference]: Without dead ends: 178 [2018-10-02 11:54:43,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:54:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-02 11:54:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-02 11:54:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-02 11:54:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-02 11:54:43,409 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-10-02 11:54:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:43,409 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-02 11:54:43,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:54:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-02 11:54:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-02 11:54:43,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:43,410 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-10-02 11:54:43,410 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:43,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-10-02 11:54:43,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:43,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:43,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:43,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:44,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:44,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:45,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-10-02 11:54:45,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:45,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:47,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:47,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-02 11:54:47,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-02 11:54:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-02 11:54:47,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-10-02 11:54:47,556 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-10-02 11:54:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:53,978 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-10-02 11:54:53,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-02 11:54:53,978 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-10-02 11:54:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:53,980 INFO L225 Difference]: With dead ends: 185 [2018-10-02 11:54:53,980 INFO L226 Difference]: Without dead ends: 181 [2018-10-02 11:54:53,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-10-02 11:54:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-02 11:54:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-02 11:54:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-02 11:54:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-02 11:54:53,985 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-10-02 11:54:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:53,986 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-02 11:54:53,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-02 11:54:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-02 11:54:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-02 11:54:53,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:53,987 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-10-02 11:54:53,987 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:53,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:53,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-10-02 11:54:53,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:53,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:53,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:53,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:55,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:55,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:55,774 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:55,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:55,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:55,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:54:55,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:54:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:54:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:54:55,830 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-10-02 11:54:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:55,937 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-10-02 11:54:55,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:54:55,937 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-10-02 11:54:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:55,938 INFO L225 Difference]: With dead ends: 186 [2018-10-02 11:54:55,938 INFO L226 Difference]: Without dead ends: 182 [2018-10-02 11:54:55,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:54:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-02 11:54:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-02 11:54:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-02 11:54:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-02 11:54:55,944 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-10-02 11:54:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:55,944 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-02 11:54:55,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:54:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-02 11:54:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-02 11:54:55,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:55,945 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-10-02 11:54:55,946 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:55,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:55,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-10-02 11:54:55,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:55,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:55,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:55,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:55,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:57,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:57,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:57,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:57,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:57,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:57,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:54:57,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:54:57,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:54:57,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:54:57,460 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-10-02 11:54:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:57,654 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-10-02 11:54:57,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:54:57,655 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-10-02 11:54:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:57,656 INFO L225 Difference]: With dead ends: 188 [2018-10-02 11:54:57,656 INFO L226 Difference]: Without dead ends: 184 [2018-10-02 11:54:57,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:54:57,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-02 11:54:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-10-02 11:54:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-02 11:54:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-10-02 11:54:57,661 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-10-02 11:54:57,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:57,661 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-10-02 11:54:57,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:54:57,661 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-10-02 11:54:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-02 11:54:57,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:57,662 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-10-02 11:54:57,662 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:57,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:57,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-10-02 11:54:57,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:57,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:57,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:57,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:59,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:59,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:59,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:59,162 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-02 11:54:59,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:59,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:59,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:59,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:54:59,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:54:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:54:59,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:54:59,220 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-10-02 11:54:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:59,360 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-10-02 11:54:59,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:54:59,361 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-10-02 11:54:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:59,362 INFO L225 Difference]: With dead ends: 189 [2018-10-02 11:54:59,362 INFO L226 Difference]: Without dead ends: 185 [2018-10-02 11:54:59,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:54:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-02 11:54:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-02 11:54:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-02 11:54:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-02 11:54:59,367 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-10-02 11:54:59,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:59,367 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-02 11:54:59,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:54:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-02 11:54:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-02 11:54:59,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:59,368 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-10-02 11:54:59,368 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:59,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:59,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-10-02 11:54:59,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:59,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:59,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:59,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:01,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:01,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:01,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-10-02 11:55:01,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:01,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:01,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:55:01,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:55:01,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:55:01,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:55:01,308 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-10-02 11:55:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:01,541 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-10-02 11:55:01,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:55:01,542 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-10-02 11:55:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:01,543 INFO L225 Difference]: With dead ends: 191 [2018-10-02 11:55:01,543 INFO L226 Difference]: Without dead ends: 187 [2018-10-02 11:55:01,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:55:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-02 11:55:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-02 11:55:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-02 11:55:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-10-02 11:55:01,548 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-10-02 11:55:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:01,549 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-10-02 11:55:01,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:55:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-10-02 11:55:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-02 11:55:01,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:01,550 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-10-02 11:55:01,550 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:01,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:01,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-10-02 11:55:01,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:01,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:01,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:01,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:03,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:03,091 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:03,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-10-02 11:55:03,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:03,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:06,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-02 11:55:06,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-02 11:55:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-02 11:55:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-10-02 11:55:06,238 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-10-02 11:55:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:13,299 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-10-02 11:55:13,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-02 11:55:13,300 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-10-02 11:55:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:13,301 INFO L225 Difference]: With dead ends: 194 [2018-10-02 11:55:13,301 INFO L226 Difference]: Without dead ends: 190 [2018-10-02 11:55:13,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-10-02 11:55:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-02 11:55:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-10-02 11:55:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-02 11:55:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-02 11:55:13,306 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-10-02 11:55:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:13,307 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-02 11:55:13,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-02 11:55:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-02 11:55:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-02 11:55:13,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:13,307 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-10-02 11:55:13,308 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:13,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:13,308 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-10-02 11:55:13,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:13,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:13,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:13,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:13,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:14,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:14,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:14,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:14,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:14,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:14,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:55:14,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:55:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:55:14,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:55:14,855 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-10-02 11:55:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:15,057 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-10-02 11:55:15,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:55:15,057 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-10-02 11:55:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:15,058 INFO L225 Difference]: With dead ends: 195 [2018-10-02 11:55:15,059 INFO L226 Difference]: Without dead ends: 191 [2018-10-02 11:55:15,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:55:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-02 11:55:15,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-02 11:55:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-02 11:55:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-02 11:55:15,064 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-10-02 11:55:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:15,064 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-02 11:55:15,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:55:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-02 11:55:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-02 11:55:15,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:15,066 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-10-02 11:55:15,066 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:15,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:15,066 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-10-02 11:55:15,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:15,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:15,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:15,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:15,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:16,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:16,825 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:16,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:16,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:16,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:16,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:55:16,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:55:16,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:55:16,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:55:16,938 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-10-02 11:55:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:17,118 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-10-02 11:55:17,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:55:17,119 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-10-02 11:55:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:17,120 INFO L225 Difference]: With dead ends: 197 [2018-10-02 11:55:17,120 INFO L226 Difference]: Without dead ends: 193 [2018-10-02 11:55:17,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:55:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-02 11:55:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-02 11:55:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-02 11:55:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-10-02 11:55:17,124 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-10-02 11:55:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:17,125 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-10-02 11:55:17,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:55:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-10-02 11:55:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-02 11:55:17,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:17,126 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-10-02 11:55:17,126 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:17,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-10-02 11:55:17,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:17,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:17,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:17,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:17,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:18,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:18,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:18,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:18,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:18,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:18,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:18,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:18,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:55:18,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:55:18,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:55:18,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:55:18,749 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-10-02 11:55:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:18,903 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-10-02 11:55:18,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:55:18,904 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-10-02 11:55:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:18,905 INFO L225 Difference]: With dead ends: 198 [2018-10-02 11:55:18,905 INFO L226 Difference]: Without dead ends: 194 [2018-10-02 11:55:18,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:55:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-02 11:55:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-10-02 11:55:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-02 11:55:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-10-02 11:55:18,910 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-10-02 11:55:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:18,910 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-10-02 11:55:18,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:55:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-10-02 11:55:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-02 11:55:18,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:18,911 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-10-02 11:55:18,912 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:18,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-10-02 11:55:18,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:18,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:18,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:20,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:20,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:20,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:21,029 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-02 11:55:21,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:21,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:21,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:21,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:55:21,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:55:21,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:55:21,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:55:21,092 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-10-02 11:55:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:21,270 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-10-02 11:55:21,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:55:21,271 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-10-02 11:55:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:21,271 INFO L225 Difference]: With dead ends: 200 [2018-10-02 11:55:21,272 INFO L226 Difference]: Without dead ends: 196 [2018-10-02 11:55:21,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:55:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-02 11:55:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-02 11:55:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-02 11:55:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-02 11:55:21,276 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-10-02 11:55:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:21,277 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-02 11:55:21,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:55:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-02 11:55:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-02 11:55:21,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:21,277 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-10-02 11:55:21,278 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:21,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-10-02 11:55:21,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:21,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:21,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:21,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:22,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:22,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:22,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:22,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-10-02 11:55:22,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:22,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:26,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:26,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-02 11:55:26,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-02 11:55:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-02 11:55:26,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-10-02 11:55:26,236 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-10-02 11:55:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:33,869 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-10-02 11:55:33,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-10-02 11:55:33,869 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-10-02 11:55:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:33,870 INFO L225 Difference]: With dead ends: 203 [2018-10-02 11:55:33,870 INFO L226 Difference]: Without dead ends: 199 [2018-10-02 11:55:33,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-10-02 11:55:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-02 11:55:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-02 11:55:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-02 11:55:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-10-02 11:55:33,875 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-10-02 11:55:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:33,875 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-10-02 11:55:33,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-02 11:55:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-10-02 11:55:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-02 11:55:33,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:33,876 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-10-02 11:55:33,876 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:33,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:33,876 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-10-02 11:55:33,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:33,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:33,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:33,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:33,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:35,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:35,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:35,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:35,514 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:35,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:35,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:35,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:35,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:55:35,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:55:35,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:55:35,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:55:35,596 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-10-02 11:55:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:35,755 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-10-02 11:55:35,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:55:35,755 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-10-02 11:55:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:35,756 INFO L225 Difference]: With dead ends: 204 [2018-10-02 11:55:35,756 INFO L226 Difference]: Without dead ends: 200 [2018-10-02 11:55:35,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:55:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-02 11:55:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-10-02 11:55:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-02 11:55:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-02 11:55:35,761 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-10-02 11:55:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:35,761 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-02 11:55:35,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:55:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-02 11:55:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-02 11:55:35,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:35,762 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-10-02 11:55:35,763 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:35,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-10-02 11:55:35,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:35,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:35,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:35,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:35,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:37,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:37,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:37,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:37,539 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-10-02 11:55:37,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:37,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:37,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:37,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:55:37,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:55:37,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:55:37,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:55:37,601 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-10-02 11:55:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:37,775 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-10-02 11:55:37,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:55:37,775 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-10-02 11:55:37,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:37,776 INFO L225 Difference]: With dead ends: 206 [2018-10-02 11:55:37,776 INFO L226 Difference]: Without dead ends: 202 [2018-10-02 11:55:37,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:55:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-02 11:55:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-10-02 11:55:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-02 11:55:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-10-02 11:55:37,781 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-10-02 11:55:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:37,781 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-10-02 11:55:37,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:55:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-10-02 11:55:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-02 11:55:37,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:37,782 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-10-02 11:55:37,782 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:37,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:37,783 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-10-02 11:55:37,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:37,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:37,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:37,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:37,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:39,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:39,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:39,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:39,551 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-02 11:55:39,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:39,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:39,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:39,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:55:39,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:55:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:55:39,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:55:39,616 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-10-02 11:55:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:39,786 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-10-02 11:55:39,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:55:39,786 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-10-02 11:55:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:39,787 INFO L225 Difference]: With dead ends: 207 [2018-10-02 11:55:39,787 INFO L226 Difference]: Without dead ends: 203 [2018-10-02 11:55:39,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:55:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-02 11:55:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-02 11:55:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-02 11:55:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-10-02 11:55:39,790 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-10-02 11:55:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:39,791 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-10-02 11:55:39,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:55:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-10-02 11:55:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-02 11:55:39,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:39,792 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-10-02 11:55:39,792 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:39,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-10-02 11:55:39,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:39,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:39,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:39,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:39,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:41,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:41,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:41,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:41,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:41,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:41,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:55:41,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:55:41,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:55:41,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:55:41,881 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-10-02 11:55:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:42,033 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-10-02 11:55:42,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:55:42,034 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-10-02 11:55:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:42,034 INFO L225 Difference]: With dead ends: 209 [2018-10-02 11:55:42,034 INFO L226 Difference]: Without dead ends: 205 [2018-10-02 11:55:42,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:55:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-02 11:55:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-02 11:55:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-02 11:55:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-02 11:55:42,039 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-10-02 11:55:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:42,039 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-02 11:55:42,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:55:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-02 11:55:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-02 11:55:42,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:42,040 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-10-02 11:55:42,041 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:42,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-10-02 11:55:42,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:42,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:42,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:42,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:43,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:43,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:43,703 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:43,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-02 11:55:43,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:43,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:47,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:47,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-02 11:55:47,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-02 11:55:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-02 11:55:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-10-02 11:55:47,445 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-10-02 11:55:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:55,728 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-10-02 11:55:55,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-10-02 11:55:55,729 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-10-02 11:55:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:55,729 INFO L225 Difference]: With dead ends: 212 [2018-10-02 11:55:55,729 INFO L226 Difference]: Without dead ends: 208 [2018-10-02 11:55:55,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-10-02 11:55:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-02 11:55:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-10-02 11:55:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-02 11:55:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-10-02 11:55:55,734 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-10-02 11:55:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:55,735 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-10-02 11:55:55,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-02 11:55:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-10-02 11:55:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-02 11:55:55,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:55,735 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-10-02 11:55:55,735 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:55,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-10-02 11:55:55,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:55,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:55,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:55,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:57,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:57,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:57,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:57,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:57,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:57,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:55:57,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:55:57,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:55:57,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:55:57,898 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-10-02 11:55:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:58,031 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-10-02 11:55:58,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:55:58,031 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-10-02 11:55:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:58,032 INFO L225 Difference]: With dead ends: 213 [2018-10-02 11:55:58,032 INFO L226 Difference]: Without dead ends: 209 [2018-10-02 11:55:58,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:55:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-02 11:55:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-02 11:55:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-02 11:55:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-10-02 11:55:58,037 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-10-02 11:55:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:58,037 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-10-02 11:55:58,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:55:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-10-02 11:55:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-02 11:55:58,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:58,038 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-10-02 11:55:58,038 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:58,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-10-02 11:55:58,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:58,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:58,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:58,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:58,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:59,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:59,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:59,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:59,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:59,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:59,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:00,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:00,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:56:00,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:56:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:56:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:56:00,026 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-10-02 11:56:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:00,206 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-10-02 11:56:00,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:56:00,206 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-10-02 11:56:00,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:00,207 INFO L225 Difference]: With dead ends: 215 [2018-10-02 11:56:00,207 INFO L226 Difference]: Without dead ends: 211 [2018-10-02 11:56:00,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:56:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-02 11:56:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-02 11:56:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-02 11:56:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-02 11:56:00,213 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-10-02 11:56:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:00,213 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-02 11:56:00,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:56:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-02 11:56:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-02 11:56:00,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:00,214 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-10-02 11:56:00,214 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:00,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-10-02 11:56:00,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:00,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:00,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:00,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:00,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:02,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:02,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:02,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:02,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:02,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:02,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:02,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:02,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:56:02,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:56:02,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:56:02,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:56:02,445 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-10-02 11:56:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:02,651 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-10-02 11:56:02,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:56:02,651 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-10-02 11:56:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:02,652 INFO L225 Difference]: With dead ends: 216 [2018-10-02 11:56:02,652 INFO L226 Difference]: Without dead ends: 212 [2018-10-02 11:56:02,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:56:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-02 11:56:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-10-02 11:56:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-02 11:56:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-10-02 11:56:02,656 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-10-02 11:56:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:02,656 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-10-02 11:56:02,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:56:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-10-02 11:56:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-02 11:56:02,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:02,657 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-10-02 11:56:02,657 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:02,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-10-02 11:56:02,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:02,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:02,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:02,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:02,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:04,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:04,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:04,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:04,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:56:04,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:04,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:04,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:04,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:56:04,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:56:04,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:56:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:56:04,735 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-10-02 11:56:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:04,957 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-10-02 11:56:04,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:56:04,958 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-10-02 11:56:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:04,959 INFO L225 Difference]: With dead ends: 218 [2018-10-02 11:56:04,959 INFO L226 Difference]: Without dead ends: 214 [2018-10-02 11:56:04,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:56:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-02 11:56:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-10-02 11:56:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-02 11:56:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-10-02 11:56:04,963 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-10-02 11:56:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:04,964 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-10-02 11:56:04,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:56:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-10-02 11:56:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-02 11:56:04,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:04,964 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-10-02 11:56:04,965 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:04,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-10-02 11:56:04,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:04,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:04,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:04,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:04,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:07,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:07,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:07,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:07,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-10-02 11:56:07,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:07,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-02 11:56:07,709 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-02 11:56:07,910 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:07,910 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:56:07,916 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:56:07,916 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:56:07 BoogieIcfgContainer [2018-10-02 11:56:07,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:56:07,917 INFO L168 Benchmark]: Toolchain (without parser) took 234413.08 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 144.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 397.7 MB). Peak memory consumption was 541.9 MB. Max. memory is 7.1 GB. [2018-10-02 11:56:07,918 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:56:07,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:56:07,919 INFO L168 Benchmark]: Boogie Preprocessor took 26.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:56:07,919 INFO L168 Benchmark]: RCFGBuilder took 286.91 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:56:07,920 INFO L168 Benchmark]: TraceAbstraction took 234043.47 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 144.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 376.6 MB). Peak memory consumption was 520.7 MB. Max. memory is 7.1 GB. [2018-10-02 11:56:07,922 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 286.91 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234043.47 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 144.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 376.6 MB). Peak memory consumption was 520.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 213 with TraceHistMax 70, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 84 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 233.9s OverallTime, 116 OverallIterations, 70 TraceHistogramMax, 89.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 667 SDtfs, 2487 SDslu, 11223 SDs, 0 SdLazy, 12781 SolverSat, 1111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17913 GetRequests, 11381 SyntacticMatches, 0 SemanticMatches, 6532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108474 ImplicationChecksByTransitivity, 192.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=115, 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: 0.4s AutomataMinimizationTime, 115 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 7.0s SatisfiabilityAnalysisTime, 128.0s InterpolantComputationTime, 24537 NumberOfCodeBlocks, 24537 NumberOfCodeBlocksAsserted, 2247 NumberOfCheckSat, 24309 ConstructedInterpolants, 0 QuantifiedInterpolants, 10237847 SizeOfPredicates, 0 NumberOfNonLiveVariables, 29108 ConjunctsInSsa, 4195 ConjunctsInUnsatCore, 228 InterpolantComputations, 2 PerfectInterpolantSequences, 4013/558041 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/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-56-07-931.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-56-07-931.csv Completed graceful shutdown