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/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:05:30,587 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:05:30,589 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:05:30,606 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 00:05:30,648 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 [2018-10-01 00:05:30,662 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:05:30,662 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:05:30,664 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:05:30,664 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:05:30,665 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:05:30,665 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:05:30,665 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:05:30,666 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:05:30,666 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:05:30,666 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:05:30,666 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:05:30,666 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:05:30,667 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:05:30,667 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:05:30,667 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:05:30,667 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:05:30,669 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:05:30,669 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:05:30,669 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:05:30,669 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:05:30,669 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:05:30,670 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:05:30,670 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:05:30,670 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:05:30,670 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:05:30,671 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:05:30,671 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:05:30,671 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:05:30,671 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:05:30,671 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:05:30,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:05:30,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:05:30,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:05:30,753 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:05:30,754 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:05:30,755 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-10-01 00:05:30,755 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-10-01 00:05:30,797 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:05:30,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:05:30,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:05:30,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:05:30,801 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:05:30,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,843 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-01 00:05:30,843 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-01 00:05:30,843 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-01 00:05:30,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:05:30,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:05:30,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:05:30,846 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:05:30,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/1) ... [2018-10-01 00:05:30,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:05:30,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:05:30,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:05:30,873 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:05:30,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (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 [2018-10-01 00:05:30,948 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-10-01 00:05:30,949 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-10-01 00:05:31,238 INFO L345 CfgBuilder]: Using library mode [2018-10-01 00:05:31,239 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:05:31 BoogieIcfgContainer [2018-10-01 00:05:31,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:05:31,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:05:31,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:05:31,246 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:05:31,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:30" (1/2) ... [2018-10-01 00:05:31,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b23d7b and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:05:31, skipping insertion in model container [2018-10-01 00:05:31,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:05:31" (2/2) ... [2018-10-01 00:05:31,250 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-10-01 00:05:31,260 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:05:31,271 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-01 00:05:31,329 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:05:31,330 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:05:31,330 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:05:31,330 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:05:31,331 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:05:31,331 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:05:31,331 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:05:31,331 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:05:31,331 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:05:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-01 00:05:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 00:05:31,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:31,358 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-01 00:05:31,360 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:31,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-10-01 00:05:31,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:31,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:31,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:31,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:31,497 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:05:31,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-01 00:05:31,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 00:05:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 00:05:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-01 00:05:31,517 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-01 00:05:31,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:31,596 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-01 00:05:31,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 00:05:31,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-01 00:05:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:31,607 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:05:31,607 INFO L226 Difference]: Without dead ends: 8 [2018-10-01 00:05:31,611 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 [2018-10-01 00:05:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-01 00:05:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-01 00:05:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 00:05:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-01 00:05:31,647 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-10-01 00:05:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:31,647 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-01 00:05:31,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 00:05:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-01 00:05:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-01 00:05:31,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:31,648 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-01 00:05:31,649 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:31,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:31,649 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-10-01 00:05:31,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:31,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:31,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:31,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:31,674 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:05:31,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-01 00:05:31,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 00:05:31,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 00:05:31,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-01 00:05:31,679 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-10-01 00:05:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:31,737 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-01 00:05:31,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 00:05:31,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-01 00:05:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:31,739 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:05:31,739 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 00:05:31,741 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 [2018-10-01 00:05:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 00:05:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 00:05:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 00:05:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-01 00:05:31,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-01 00:05:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:31,744 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-01 00:05:31,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 00:05:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-01 00:05:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:05:31,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:31,746 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-01 00:05:31,746 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:31,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:31,747 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-10-01 00:05:31,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:31,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:31,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:31,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:31,856 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:05:31,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-01 00:05:31,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:05:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:05:31,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-01 00:05:31,858 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-01 00:05:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:31,923 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-01 00:05:31,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:05:31,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-01 00:05:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:31,924 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:05:31,924 INFO L226 Difference]: Without dead ends: 8 [2018-10-01 00:05:31,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-01 00:05:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-01 00:05:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-01 00:05:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 00:05:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-01 00:05:31,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-01 00:05:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:31,927 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-01 00:05:31,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:05:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-01 00:05:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 00:05:31,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:31,928 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-01 00:05:31,929 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:31,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-10-01 00:05:31,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:31,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:31,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:31,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:32,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:32,025 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 [2018-10-01 00:05:32,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:32,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:32,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:32,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-01 00:05:32,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:05:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:05:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-01 00:05:32,096 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-10-01 00:05:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:32,136 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-01 00:05:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:05:32,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-01 00:05:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:32,138 INFO L225 Difference]: With dead ends: 14 [2018-10-01 00:05:32,138 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 00:05:32,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-01 00:05:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 00:05:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-10-01 00:05:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 00:05:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-01 00:05:32,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-01 00:05:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:32,142 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-01 00:05:32,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:05:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-01 00:05:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:05:32,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:32,144 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-01 00:05:32,144 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:32,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-10-01 00:05:32,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:32,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:32,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:32,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:32,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:32,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:32,215 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 [2018-10-01 00:05:32,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:32,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:32,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:32,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:32,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:32,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 00:05:32,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:05:32,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:05:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:05:32,306 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-10-01 00:05:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:32,400 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-10-01 00:05:32,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:05:32,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-01 00:05:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:32,402 INFO L225 Difference]: With dead ends: 15 [2018-10-01 00:05:32,402 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 00:05:32,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:05:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 00:05:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 00:05:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:05:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-01 00:05:32,407 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-10-01 00:05:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:32,408 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-01 00:05:32,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:05:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-01 00:05:32,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:05:32,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:32,409 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-01 00:05:32,409 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:32,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-10-01 00:05:32,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:32,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:32,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:32,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:32,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:32,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:32,595 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 [2018-10-01 00:05:32,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:32,615 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-01 00:05:32,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:32,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:32,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:32,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 00:05:32,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:05:32,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:05:32,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:05:32,659 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-01 00:05:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:32,723 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-01 00:05:32,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:05:32,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-01 00:05:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:32,724 INFO L225 Difference]: With dead ends: 13 [2018-10-01 00:05:32,724 INFO L226 Difference]: Without dead ends: 10 [2018-10-01 00:05:32,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:05:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-01 00:05:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-01 00:05:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 00:05:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-01 00:05:32,728 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-10-01 00:05:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:32,729 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-01 00:05:32,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:05:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-01 00:05:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 00:05:32,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:32,730 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-10-01 00:05:32,730 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:32,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-10-01 00:05:32,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:32,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:32,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:32,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:32,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:32,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:32,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:32,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:32,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:32,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:32,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:32,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:32,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-01 00:05:32,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:05:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:05:32,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:05:32,962 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-10-01 00:05:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:33,058 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-01 00:05:33,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:05:33,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-01 00:05:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:33,061 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:05:33,061 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 00:05:33,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:05:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 00:05:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-10-01 00:05:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 00:05:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-01 00:05:33,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-01 00:05:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:33,067 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-01 00:05:33,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:05:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-01 00:05:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:05:33,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:33,068 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-01 00:05:33,068 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:33,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-10-01 00:05:33,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:33,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:33,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:33,161 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 [2018-10-01 00:05:33,168 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:33,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-10-01 00:05:33,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:33,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:33,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 00:05:33,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 00:05:33,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 00:05:33,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:05:33,224 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-10-01 00:05:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:33,265 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-01 00:05:33,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:05:33,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-01 00:05:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:33,267 INFO L225 Difference]: With dead ends: 18 [2018-10-01 00:05:33,267 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 00:05:33,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:05:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 00:05:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 00:05:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:05:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-01 00:05:33,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-01 00:05:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:33,271 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-01 00:05:33,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 00:05:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-01 00:05:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:05:33,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:33,272 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-01 00:05:33,272 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:33,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-10-01 00:05:33,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:33,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:33,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:33,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:33,344 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:33,386 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-01 00:05:33,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:33,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:33,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 00:05:33,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 00:05:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 00:05:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:05:33,424 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-01 00:05:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:33,459 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-01 00:05:33,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:05:33,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-01 00:05:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:33,461 INFO L225 Difference]: With dead ends: 15 [2018-10-01 00:05:33,461 INFO L226 Difference]: Without dead ends: 12 [2018-10-01 00:05:33,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:05:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-01 00:05:33,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-01 00:05:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 00:05:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-01 00:05:33,465 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-10-01 00:05:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:33,466 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-01 00:05:33,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 00:05:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-01 00:05:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 00:05:33,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:33,467 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-10-01 00:05:33,467 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:33,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-10-01 00:05:33,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:33,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:33,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:33,579 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 [2018-10-01 00:05:33,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:33,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 00:05:33,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 00:05:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 00:05:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:05:33,629 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-10-01 00:05:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:33,971 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-01 00:05:33,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:05:33,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-01 00:05:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:33,972 INFO L225 Difference]: With dead ends: 20 [2018-10-01 00:05:33,972 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 00:05:33,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:05:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 00:05:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-01 00:05:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 00:05:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-01 00:05:33,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-01 00:05:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:33,977 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-01 00:05:33,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 00:05:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-01 00:05:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 00:05:33,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:33,978 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-01 00:05:33,978 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:33,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:33,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-10-01 00:05:33,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:33,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:33,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:34,196 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 [2018-10-01 00:05:34,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:34,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:34,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:34,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:34,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 00:05:34,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 00:05:34,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 00:05:34,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:05:34,248 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-10-01 00:05:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:34,304 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-01 00:05:34,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:05:34,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-01 00:05:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:34,304 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:05:34,305 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:05:34,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:05:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:05:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 00:05:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 00:05:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-01 00:05:34,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-10-01 00:05:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:34,308 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-01 00:05:34,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 00:05:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-01 00:05:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 00:05:34,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:34,309 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-01 00:05:34,310 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:34,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-10-01 00:05:34,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:34,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:34,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:34,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:34,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:34,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:34,462 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-01 00:05:34,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:34,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:34,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 00:05:34,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 00:05:34,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 00:05:34,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:05:34,501 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-01 00:05:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:34,556 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-01 00:05:34,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:05:34,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-01 00:05:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:34,558 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:05:34,558 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 00:05:34,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:05:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 00:05:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-01 00:05:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 00:05:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-01 00:05:34,561 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-10-01 00:05:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:34,562 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-01 00:05:34,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 00:05:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-01 00:05:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 00:05:34,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:34,563 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-10-01 00:05:34,563 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:34,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-10-01 00:05:34,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:34,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:34,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:34,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:34,692 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 [2018-10-01 00:05:34,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:34,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:34,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:34,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:34,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 00:05:34,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 00:05:34,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 00:05:34,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:05:34,751 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-01 00:05:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:34,841 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-01 00:05:34,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:05:34,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-01 00:05:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:34,843 INFO L225 Difference]: With dead ends: 23 [2018-10-01 00:05:34,843 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 00:05:34,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:05:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 00:05:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-10-01 00:05:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 00:05:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-01 00:05:34,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-01 00:05:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:34,848 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-01 00:05:34,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 00:05:34,848 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-01 00:05:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:05:34,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:34,849 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-01 00:05:34,849 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:34,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-10-01 00:05:34,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:34,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:34,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:34,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:34,947 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 [2018-10-01 00:05:34,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:34,968 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-01 00:05:34,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:34,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:35,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 00:05:35,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:05:35,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:05:35,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-01 00:05:35,002 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-10-01 00:05:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:35,096 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-01 00:05:35,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:05:35,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-01 00:05:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:35,097 INFO L225 Difference]: With dead ends: 24 [2018-10-01 00:05:35,097 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 00:05:35,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-01 00:05:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 00:05:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 00:05:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 00:05:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-01 00:05:35,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-01 00:05:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:35,101 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-01 00:05:35,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:05:35,101 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-01 00:05:35,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:05:35,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:35,102 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-01 00:05:35,102 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:35,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:35,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-10-01 00:05:35,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:35,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:35,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:35,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:35,168 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 [2018-10-01 00:05:35,178 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:35,208 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-01 00:05:35,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:35,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:35,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 00:05:35,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:05:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:05:35,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-01 00:05:35,238 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-01 00:05:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:35,307 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-01 00:05:35,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:05:35,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-01 00:05:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:35,308 INFO L225 Difference]: With dead ends: 19 [2018-10-01 00:05:35,308 INFO L226 Difference]: Without dead ends: 16 [2018-10-01 00:05:35,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-01 00:05:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-01 00:05:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-01 00:05:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 00:05:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-01 00:05:35,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-10-01 00:05:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:35,313 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-01 00:05:35,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:05:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-01 00:05:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 00:05:35,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:35,314 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-10-01 00:05:35,314 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:35,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:35,314 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-10-01 00:05:35,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:35,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:35,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:35,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:35,460 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 [2018-10-01 00:05:35,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:35,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:35,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 00:05:35,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:05:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:05:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-01 00:05:35,582 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-01 00:05:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:35,789 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-01 00:05:35,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:05:35,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-01 00:05:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:35,790 INFO L225 Difference]: With dead ends: 26 [2018-10-01 00:05:35,790 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 00:05:35,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-01 00:05:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 00:05:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-01 00:05:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 00:05:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-01 00:05:35,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-10-01 00:05:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:35,795 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-01 00:05:35,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:05:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-01 00:05:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:05:35,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:35,796 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-01 00:05:35,796 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:35,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-10-01 00:05:35,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:35,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:35,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:35,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:35,917 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 [2018-10-01 00:05:35,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:35,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:35,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:35,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:35,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 00:05:35,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:05:35,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:05:35,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:05:35,976 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-10-01 00:05:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:36,022 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-01 00:05:36,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:05:36,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-01 00:05:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:36,023 INFO L225 Difference]: With dead ends: 27 [2018-10-01 00:05:36,023 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 00:05:36,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:05:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 00:05:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 00:05:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 00:05:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-01 00:05:36,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-10-01 00:05:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:36,028 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-01 00:05:36,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:05:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-01 00:05:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:05:36,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:36,029 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-01 00:05:36,029 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:36,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-10-01 00:05:36,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:36,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:36,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:36,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:36,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:36,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:36,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 00:05:36,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:36,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:36,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 00:05:36,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:05:36,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:05:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:05:36,231 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-01 00:05:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:36,269 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-01 00:05:36,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:05:36,270 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-01 00:05:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:36,271 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:05:36,271 INFO L226 Difference]: Without dead ends: 18 [2018-10-01 00:05:36,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:05:36,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-01 00:05:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-01 00:05:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 00:05:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-01 00:05:36,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-10-01 00:05:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:36,277 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-01 00:05:36,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:05:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-01 00:05:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 00:05:36,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:36,278 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-10-01 00:05:36,278 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:36,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-10-01 00:05:36,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:36,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:36,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:36,411 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:36,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:36,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:36,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:36,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 00:05:36,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:05:36,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:05:36,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:05:36,530 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-10-01 00:05:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:36,764 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-01 00:05:36,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:05:36,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-10-01 00:05:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:36,766 INFO L225 Difference]: With dead ends: 29 [2018-10-01 00:05:36,766 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 00:05:36,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:05:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 00:05:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-01 00:05:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 00:05:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-01 00:05:36,772 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-01 00:05:36,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:36,773 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-01 00:05:36,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:05:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-01 00:05:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:05:36,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:36,774 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-01 00:05:36,774 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:36,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-10-01 00:05:36,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:36,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:36,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:36,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:36,896 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 [2018-10-01 00:05:36,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:36,960 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-01 00:05:36,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:36,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:36,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 00:05:36,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:05:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:05:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-01 00:05:36,991 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-10-01 00:05:37,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:37,080 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-01 00:05:37,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:05:37,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-01 00:05:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:37,081 INFO L225 Difference]: With dead ends: 30 [2018-10-01 00:05:37,081 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:05:37,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-01 00:05:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:05:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 00:05:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:05:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-01 00:05:37,085 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-10-01 00:05:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:37,085 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-01 00:05:37,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:05:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-01 00:05:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:05:37,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:37,086 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-01 00:05:37,087 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:37,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:37,087 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-10-01 00:05:37,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:37,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:37,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:37,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:37,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:37,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:37,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:37,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-01 00:05:37,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:37,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:37,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:37,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 00:05:37,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:05:37,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:05:37,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-01 00:05:37,252 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-01 00:05:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:37,288 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-01 00:05:37,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:05:37,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-01 00:05:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:37,289 INFO L225 Difference]: With dead ends: 23 [2018-10-01 00:05:37,290 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 00:05:37,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-01 00:05:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 00:05:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-01 00:05:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 00:05:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-01 00:05:37,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-10-01 00:05:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:37,294 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-01 00:05:37,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:05:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-01 00:05:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:05:37,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:37,295 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-10-01 00:05:37,295 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:37,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:37,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-10-01 00:05:37,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:37,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:37,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:37,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:37,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:37,436 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 [2018-10-01 00:05:37,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:37,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:37,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:37,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 00:05:37,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:05:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:05:37,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-01 00:05:37,578 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-10-01 00:05:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:37,847 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-01 00:05:37,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:05:37,847 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-10-01 00:05:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:37,848 INFO L225 Difference]: With dead ends: 32 [2018-10-01 00:05:37,848 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 00:05:37,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-01 00:05:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 00:05:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-01 00:05:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 00:05:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-01 00:05:37,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-10-01 00:05:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:37,852 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-01 00:05:37,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:05:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-01 00:05:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 00:05:37,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:37,853 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-01 00:05:37,853 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:37,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:37,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-10-01 00:05:37,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:37,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:37,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:37,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:38,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:38,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:38,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:38,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:38,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:38,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:05:38,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:05:38,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:05:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:05:38,333 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-10-01 00:05:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:38,410 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-01 00:05:38,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:05:38,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-01 00:05:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:38,411 INFO L225 Difference]: With dead ends: 33 [2018-10-01 00:05:38,412 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 00:05:38,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:05:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 00:05:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 00:05:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 00:05:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-01 00:05:38,417 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-01 00:05:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:38,417 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-01 00:05:38,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:05:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-01 00:05:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 00:05:38,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:38,418 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-01 00:05:38,420 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:38,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-10-01 00:05:38,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:38,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:38,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:38,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:38,596 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 [2018-10-01 00:05:38,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:38,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-01 00:05:38,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:38,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:38,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:05:38,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:05:38,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:05:38,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:05:38,711 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-01 00:05:38,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:38,753 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-01 00:05:38,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:05:38,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-01 00:05:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:38,754 INFO L225 Difference]: With dead ends: 25 [2018-10-01 00:05:38,754 INFO L226 Difference]: Without dead ends: 22 [2018-10-01 00:05:38,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:05:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-01 00:05:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-01 00:05:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 00:05:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-01 00:05:38,758 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-01 00:05:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:38,758 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-01 00:05:38,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:05:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-01 00:05:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:38,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:38,759 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-10-01 00:05:38,759 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:38,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:38,760 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-10-01 00:05:38,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:38,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:39,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:39,033 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 [2018-10-01 00:05:39,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:39,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:39,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:39,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:39,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:39,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 00:05:39,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:05:39,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:05:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:05:39,145 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-10-01 00:05:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:39,530 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-01 00:05:39,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:05:39,531 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-10-01 00:05:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:39,532 INFO L225 Difference]: With dead ends: 35 [2018-10-01 00:05:39,532 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 00:05:39,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:05:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 00:05:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-10-01 00:05:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 00:05:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-01 00:05:39,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-10-01 00:05:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:39,539 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-01 00:05:39,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:05:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-01 00:05:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 00:05:39,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:39,540 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-01 00:05:39,540 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:39,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-10-01 00:05:39,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:39,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:39,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:39,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:39,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:39,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:39,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:39,840 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:39,886 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 00:05:39,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:39,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:39,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:39,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:39,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:39,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:39,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:39,922 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-10-01 00:05:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:40,011 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-01 00:05:40,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:40,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-01 00:05:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:40,011 INFO L225 Difference]: With dead ends: 36 [2018-10-01 00:05:40,012 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 00:05:40,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 00:05:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-01 00:05:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 00:05:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-01 00:05:40,017 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-10-01 00:05:40,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:40,017 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-01 00:05:40,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-01 00:05:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 00:05:40,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:40,018 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-01 00:05:40,018 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:40,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:40,019 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-10-01 00:05:40,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:40,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:40,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:40,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:40,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:40,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:40,155 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 [2018-10-01 00:05:40,166 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:40,180 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-01 00:05:40,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:40,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:40,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:40,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:40,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:40,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:40,214 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-01 00:05:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:40,253 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-01 00:05:40,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:40,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-01 00:05:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:40,254 INFO L225 Difference]: With dead ends: 27 [2018-10-01 00:05:40,254 INFO L226 Difference]: Without dead ends: 24 [2018-10-01 00:05:40,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-01 00:05:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-01 00:05:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 00:05:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-01 00:05:40,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-10-01 00:05:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:40,259 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-01 00:05:40,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-01 00:05:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-01 00:05:40,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:40,260 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-10-01 00:05:40,260 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:40,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:40,261 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-10-01 00:05:40,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:40,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:40,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:40,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:40,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:40,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:40,552 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 [2018-10-01 00:05:40,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:40,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:40,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:40,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:05:40,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:40,617 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-10-01 00:05:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:40,867 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-01 00:05:40,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:40,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-01 00:05:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:40,868 INFO L225 Difference]: With dead ends: 38 [2018-10-01 00:05:40,868 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 00:05:40,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 00:05:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-01 00:05:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:05:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-01 00:05:40,871 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-10-01 00:05:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:40,872 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-01 00:05:40,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-01 00:05:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 00:05:40,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:40,873 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-01 00:05:40,873 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:40,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-10-01 00:05:40,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:40,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:40,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:40,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:40,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:41,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:41,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:41,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:41,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:41,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:41,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:41,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:41,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-01 00:05:41,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 00:05:41,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 00:05:41,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:05:41,168 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-10-01 00:05:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:41,259 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-01 00:05:41,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:05:41,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-01 00:05:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:41,261 INFO L225 Difference]: With dead ends: 39 [2018-10-01 00:05:41,261 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 00:05:41,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:05:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 00:05:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 00:05:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 00:05:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-01 00:05:41,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-10-01 00:05:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:41,266 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-01 00:05:41,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 00:05:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-01 00:05:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 00:05:41,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:41,267 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-01 00:05:41,267 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:41,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:41,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-10-01 00:05:41,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:41,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:41,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:41,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:41,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:41,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:41,372 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 [2018-10-01 00:05:41,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:41,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 00:05:41,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:41,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:41,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:41,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-01 00:05:41,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 00:05:41,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 00:05:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:05:41,437 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-10-01 00:05:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:41,584 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-01 00:05:41,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:05:41,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-01 00:05:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:41,585 INFO L225 Difference]: With dead ends: 29 [2018-10-01 00:05:41,586 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 00:05:41,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:05:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 00:05:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-01 00:05:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:05:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-01 00:05:41,590 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-10-01 00:05:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:41,590 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-01 00:05:41,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 00:05:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-01 00:05:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-01 00:05:41,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:41,591 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-10-01 00:05:41,591 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:41,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-10-01 00:05:41,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:41,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:41,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:41,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:41,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:42,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:42,364 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 [2018-10-01 00:05:42,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:42,387 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:42,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:42,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:42,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:42,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:42,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 00:05:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 00:05:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:05:42,418 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-10-01 00:05:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:42,624 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-01 00:05:42,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:05:42,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-01 00:05:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:42,626 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:05:42,626 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 00:05:42,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:05:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 00:05:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-10-01 00:05:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:05:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-01 00:05:42,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-10-01 00:05:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:42,631 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-01 00:05:42,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 00:05:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-01 00:05:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 00:05:42,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:42,631 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-01 00:05:42,632 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:42,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:42,632 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-10-01 00:05:42,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:42,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:42,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:42,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:42,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:42,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:42,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-01 00:05:42,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:42,895 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 00:05:42,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:42,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:42,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:42,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-01 00:05:42,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:05:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:05:42,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-01 00:05:42,932 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-01 00:05:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:43,052 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-01 00:05:43,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:05:43,052 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-01 00:05:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:43,053 INFO L225 Difference]: With dead ends: 42 [2018-10-01 00:05:43,053 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 00:05:43,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-01 00:05:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 00:05:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 00:05:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 00:05:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-01 00:05:43,057 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-10-01 00:05:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:43,057 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-01 00:05:43,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:05:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-01 00:05:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 00:05:43,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:43,058 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-01 00:05:43,058 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:43,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:43,059 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-10-01 00:05:43,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:43,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:43,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:43,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:43,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:43,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:43,270 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 [2018-10-01 00:05:43,278 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:43,297 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 00:05:43,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:43,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:43,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:43,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-01 00:05:43,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:05:43,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:05:43,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-01 00:05:43,338 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-01 00:05:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:43,432 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-01 00:05:43,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:05:43,432 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-01 00:05:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:43,433 INFO L225 Difference]: With dead ends: 31 [2018-10-01 00:05:43,433 INFO L226 Difference]: Without dead ends: 28 [2018-10-01 00:05:43,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-01 00:05:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-01 00:05:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-01 00:05:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:05:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-01 00:05:43,439 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-10-01 00:05:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:43,439 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-01 00:05:43,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:05:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-01 00:05:43,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-01 00:05:43,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:43,440 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-10-01 00:05:43,440 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:43,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:43,440 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-10-01 00:05:43,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:43,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:43,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:43,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:43,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:44,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:44,030 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 [2018-10-01 00:05:44,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:44,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:44,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:44,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-01 00:05:44,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:05:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:05:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-01 00:05:44,111 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-10-01 00:05:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:44,394 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-01 00:05:44,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:05:44,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-01 00:05:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:44,395 INFO L225 Difference]: With dead ends: 44 [2018-10-01 00:05:44,395 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:05:44,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-01 00:05:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:05:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 00:05:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:05:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-01 00:05:44,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-10-01 00:05:44,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:44,399 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-01 00:05:44,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:05:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-01 00:05:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 00:05:44,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:44,400 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-01 00:05:44,400 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:44,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-10-01 00:05:44,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:44,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:44,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:44,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:44,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:44,962 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 [2018-10-01 00:05:44,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:44,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:44,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:44,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:45,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:45,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-01 00:05:45,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:05:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:05:45,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:05:45,017 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-10-01 00:05:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:45,117 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-01 00:05:45,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:05:45,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-01 00:05:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:45,123 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:05:45,123 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 00:05:45,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:05:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 00:05:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 00:05:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 00:05:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-01 00:05:45,133 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-10-01 00:05:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:45,133 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-01 00:05:45,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:05:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-01 00:05:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 00:05:45,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:45,134 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-01 00:05:45,134 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:45,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-10-01 00:05:45,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:45,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:45,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:45,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:45,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:45,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:45,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:45,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:45,329 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 00:05:45,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:45,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:45,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:45,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-01 00:05:45,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:05:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:05:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:05:45,361 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-10-01 00:05:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:45,645 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-01 00:05:45,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:05:45,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-01 00:05:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:45,646 INFO L225 Difference]: With dead ends: 33 [2018-10-01 00:05:45,647 INFO L226 Difference]: Without dead ends: 30 [2018-10-01 00:05:45,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:05:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-01 00:05:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-01 00:05:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:05:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-01 00:05:45,650 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-10-01 00:05:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:45,650 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-01 00:05:45,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:05:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-01 00:05:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-01 00:05:45,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:45,651 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-10-01 00:05:45,651 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:45,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:45,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-10-01 00:05:45,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:45,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:45,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:45,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:45,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:46,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:46,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:46,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:46,106 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:46,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:46,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:46,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:46,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-01 00:05:46,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:05:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:05:46,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:05:46,137 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-01 00:05:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:46,496 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-10-01 00:05:46,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:05:46,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-10-01 00:05:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:46,497 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:05:46,497 INFO L226 Difference]: Without dead ends: 44 [2018-10-01 00:05:46,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:05:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-01 00:05:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-10-01 00:05:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:05:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-01 00:05:46,501 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-01 00:05:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:46,501 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-01 00:05:46,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:05:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-01 00:05:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 00:05:46,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:46,502 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-01 00:05:46,502 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:46,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-10-01 00:05:46,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:46,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:46,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:46,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:46,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:46,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:46,847 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 [2018-10-01 00:05:46,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:46,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 00:05:46,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:46,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:46,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:46,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-01 00:05:46,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:05:46,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:05:46,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-01 00:05:46,924 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-10-01 00:05:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:47,006 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-01 00:05:47,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:05:47,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-01 00:05:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:47,007 INFO L225 Difference]: With dead ends: 48 [2018-10-01 00:05:47,007 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 00:05:47,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-01 00:05:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 00:05:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-01 00:05:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 00:05:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-01 00:05:47,011 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-10-01 00:05:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:47,011 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-01 00:05:47,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:05:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-01 00:05:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 00:05:47,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:47,012 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-01 00:05:47,012 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:47,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:47,013 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-10-01 00:05:47,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:47,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:47,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:47,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:47,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:47,195 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 [2018-10-01 00:05:47,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:47,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 00:05:47,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:47,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:47,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:47,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-01 00:05:47,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:05:47,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:05:47,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-01 00:05:47,258 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-01 00:05:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:47,305 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-01 00:05:47,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:05:47,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-01 00:05:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:47,306 INFO L225 Difference]: With dead ends: 35 [2018-10-01 00:05:47,306 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 00:05:47,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-01 00:05:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 00:05:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-01 00:05:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:05:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-01 00:05:47,309 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-10-01 00:05:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:47,309 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-01 00:05:47,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:05:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-01 00:05:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-01 00:05:47,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:47,310 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-10-01 00:05:47,310 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:47,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:47,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-10-01 00:05:47,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:47,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:47,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:47,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:47,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:47,564 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 [2018-10-01 00:05:47,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:47,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:47,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:47,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-01 00:05:47,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:05:47,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:05:47,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-01 00:05:47,619 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-10-01 00:05:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:47,887 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-01 00:05:47,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:05:47,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-01 00:05:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:47,888 INFO L225 Difference]: With dead ends: 50 [2018-10-01 00:05:47,889 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:05:47,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-01 00:05:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:05:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 00:05:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:05:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-01 00:05:47,892 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-10-01 00:05:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:47,892 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-01 00:05:47,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:05:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-01 00:05:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 00:05:47,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:47,893 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-01 00:05:47,893 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:47,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-10-01 00:05:47,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:47,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:47,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:47,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:48,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:48,047 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 [2018-10-01 00:05:48,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:48,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:48,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:48,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:48,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:48,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-01 00:05:48,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:05:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:05:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:05:48,114 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-10-01 00:05:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:48,237 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-01 00:05:48,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:05:48,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-01 00:05:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:48,238 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:05:48,238 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 00:05:48,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:05:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 00:05:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 00:05:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 00:05:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-01 00:05:48,241 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-10-01 00:05:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:48,241 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-01 00:05:48,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:05:48,242 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-01 00:05:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 00:05:48,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:48,242 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-01 00:05:48,242 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:48,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-10-01 00:05:48,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:48,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:48,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:48,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:48,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:48,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:48,402 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 [2018-10-01 00:05:48,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:48,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 00:05:48,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:48,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:48,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:48,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-01 00:05:48,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:05:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:05:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:05:48,472 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-01 00:05:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:48,599 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-01 00:05:48,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:05:48,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-01 00:05:48,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:48,600 INFO L225 Difference]: With dead ends: 37 [2018-10-01 00:05:48,600 INFO L226 Difference]: Without dead ends: 34 [2018-10-01 00:05:48,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:05:48,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-01 00:05:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-01 00:05:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:05:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-01 00:05:48,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-10-01 00:05:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:48,604 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-01 00:05:48,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:05:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-01 00:05:48,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-01 00:05:48,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:48,604 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-10-01 00:05:48,605 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:48,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-10-01 00:05:48,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:48,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:48,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:48,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:48,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:48,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:48,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:48,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:48,914 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:48,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:48,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:48,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:48,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-01 00:05:48,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:05:48,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:05:48,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:05:48,944 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-10-01 00:05:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:49,267 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-01 00:05:49,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:05:49,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-10-01 00:05:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:49,268 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:05:49,269 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 00:05:49,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:05:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 00:05:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-10-01 00:05:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:05:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-01 00:05:49,273 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-10-01 00:05:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:49,273 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-01 00:05:49,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:05:49,273 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-01 00:05:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:05:49,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:49,274 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-01 00:05:49,274 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:49,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:49,274 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-10-01 00:05:49,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:49,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:49,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:49,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:49,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:49,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:49,454 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 [2018-10-01 00:05:49,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:49,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:05:49,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:49,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:49,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:49,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-01 00:05:49,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:05:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:05:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-01 00:05:49,517 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-10-01 00:05:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:49,624 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-01 00:05:49,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:05:49,625 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-01 00:05:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:49,625 INFO L225 Difference]: With dead ends: 54 [2018-10-01 00:05:49,625 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 00:05:49,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-01 00:05:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 00:05:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 00:05:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 00:05:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-01 00:05:49,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-10-01 00:05:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:49,644 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-01 00:05:49,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:05:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-01 00:05:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:05:49,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:49,645 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-01 00:05:49,645 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:49,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:49,646 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-10-01 00:05:49,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:49,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:49,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:49,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:49,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:49,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:49,860 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 [2018-10-01 00:05:49,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:49,891 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:05:49,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:49,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:49,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:49,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-01 00:05:49,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:05:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:05:49,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-01 00:05:49,921 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-01 00:05:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:50,001 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-01 00:05:50,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:05:50,001 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-01 00:05:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:50,002 INFO L225 Difference]: With dead ends: 39 [2018-10-01 00:05:50,002 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 00:05:50,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-01 00:05:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 00:05:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-01 00:05:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:05:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-01 00:05:50,005 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-10-01 00:05:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:50,006 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-01 00:05:50,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:05:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-01 00:05:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-01 00:05:50,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:50,006 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-10-01 00:05:50,007 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:50,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-10-01 00:05:50,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:50,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:50,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:50,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:50,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:50,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:50,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:50,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:50,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:50,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:50,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-01 00:05:50,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:05:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:05:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-01 00:05:50,368 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-10-01 00:05:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:50,858 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-01 00:05:50,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:05:50,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-10-01 00:05:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:50,859 INFO L225 Difference]: With dead ends: 56 [2018-10-01 00:05:50,860 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:05:50,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-01 00:05:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:05:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-01 00:05:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-01 00:05:50,863 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-10-01 00:05:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:50,864 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-01 00:05:50,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:05:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-01 00:05:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 00:05:50,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:50,864 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-01 00:05:50,865 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:50,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:50,865 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-10-01 00:05:50,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:50,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:50,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:50,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:50,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:51,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:51,234 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 [2018-10-01 00:05:51,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:51,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:51,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:51,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:51,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:51,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-01 00:05:51,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 00:05:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 00:05:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:05:51,298 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-10-01 00:05:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:51,415 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-01 00:05:51,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:05:51,415 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-01 00:05:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:51,415 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:05:51,415 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 00:05:51,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:05:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 00:05:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 00:05:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 00:05:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-01 00:05:51,419 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-10-01 00:05:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:51,419 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-01 00:05:51,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 00:05:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-01 00:05:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 00:05:51,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:51,420 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-01 00:05:51,420 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:51,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-10-01 00:05:51,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:51,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:51,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:51,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:51,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:51,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:51,645 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 [2018-10-01 00:05:51,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:51,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:05:51,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:51,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:51,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:51,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-01 00:05:51,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 00:05:51,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 00:05:51,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:05:51,707 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-10-01 00:05:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:51,778 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-01 00:05:51,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:05:51,779 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-01 00:05:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:51,779 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:05:51,780 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 00:05:51,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:05:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 00:05:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-01 00:05:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-01 00:05:51,784 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-10-01 00:05:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:51,784 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-01 00:05:51,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 00:05:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-01 00:05:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-01 00:05:51,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:51,785 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-10-01 00:05:51,785 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:51,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-10-01 00:05:51,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:51,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:51,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:51,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:51,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:52,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:52,232 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 [2018-10-01 00:05:52,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:52,261 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:52,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:52,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:52,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:52,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-01 00:05:52,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 00:05:52,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 00:05:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:05:52,292 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-10-01 00:05:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:52,965 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-01 00:05:52,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:05:52,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-10-01 00:05:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:52,966 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:05:52,966 INFO L226 Difference]: Without dead ends: 56 [2018-10-01 00:05:52,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:05:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-01 00:05:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-01 00:05:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-01 00:05:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-01 00:05:52,970 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-10-01 00:05:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:52,971 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-01 00:05:52,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 00:05:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-01 00:05:52,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 00:05:52,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:52,971 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-01 00:05:52,972 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:52,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-10-01 00:05:52,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:52,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:52,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:52,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:52,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:53,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:53,172 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 [2018-10-01 00:05:53,180 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:53,221 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:05:53,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:53,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:53,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:53,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-01 00:05:53,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:05:53,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:05:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-01 00:05:53,263 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-10-01 00:05:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:53,864 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-01 00:05:53,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 00:05:53,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-01 00:05:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:53,865 INFO L225 Difference]: With dead ends: 60 [2018-10-01 00:05:53,865 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:05:53,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-01 00:05:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:05:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-01 00:05:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 00:05:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-01 00:05:53,868 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-10-01 00:05:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:53,868 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-01 00:05:53,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:05:53,869 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-01 00:05:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 00:05:53,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:53,869 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-01 00:05:53,869 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:53,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-10-01 00:05:53,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:53,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:53,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:53,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:53,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:54,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:54,054 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 [2018-10-01 00:05:54,061 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:54,086 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:05:54,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:54,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:54,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:54,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-01 00:05:54,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:05:54,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:05:54,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-01 00:05:54,118 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-01 00:05:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:54,189 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-01 00:05:54,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 00:05:54,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-01 00:05:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:54,191 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:05:54,191 INFO L226 Difference]: Without dead ends: 40 [2018-10-01 00:05:54,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-01 00:05:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-01 00:05:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-01 00:05:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-01 00:05:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-01 00:05:54,194 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-10-01 00:05:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:54,195 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-01 00:05:54,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:05:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-01 00:05:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-01 00:05:54,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:54,195 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-10-01 00:05:54,196 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:54,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:54,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-10-01 00:05:54,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:54,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:54,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:54,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:54,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:54,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:54,465 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 [2018-10-01 00:05:54,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:54,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:54,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:54,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-01 00:05:54,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:05:54,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:05:54,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-01 00:05:54,527 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-10-01 00:05:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:55,005 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-01 00:05:55,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 00:05:55,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-10-01 00:05:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:55,007 INFO L225 Difference]: With dead ends: 62 [2018-10-01 00:05:55,007 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:05:55,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-01 00:05:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:05:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-01 00:05:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 00:05:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-01 00:05:55,012 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-10-01 00:05:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:55,012 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-01 00:05:55,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:05:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-01 00:05:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 00:05:55,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:55,013 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-01 00:05:55,013 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:55,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:55,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-10-01 00:05:55,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:55,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:55,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:55,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:55,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:55,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:05:55,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:55,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:55,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:55,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:55,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:55,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-01 00:05:55,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 00:05:55,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 00:05:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:05:55,417 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-10-01 00:05:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:55,557 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-01 00:05:55,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 00:05:55,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-01 00:05:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:55,558 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:05:55,558 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:05:55,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:05:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:05:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 00:05:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 00:05:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-01 00:05:55,567 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-10-01 00:05:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:55,567 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-01 00:05:55,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 00:05:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-01 00:05:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 00:05:55,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:55,568 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-01 00:05:55,568 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:55,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-10-01 00:05:55,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:55,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:55,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:55,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:55,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:55,896 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 [2018-10-01 00:05:55,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:55,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:05:55,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:55,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:55,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:55,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-01 00:05:55,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 00:05:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 00:05:55,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:05:55,995 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-10-01 00:05:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:56,063 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-01 00:05:56,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 00:05:56,063 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-01 00:05:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:56,064 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:05:56,064 INFO L226 Difference]: Without dead ends: 42 [2018-10-01 00:05:56,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:05:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-01 00:05:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-01 00:05:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 00:05:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-01 00:05:56,068 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-10-01 00:05:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:56,069 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-01 00:05:56,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 00:05:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-01 00:05:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-01 00:05:56,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:56,069 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-10-01 00:05:56,070 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:56,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:56,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-10-01 00:05:56,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:56,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:56,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:56,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:56,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:56,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:56,454 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 [2018-10-01 00:05:56,463 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:56,485 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:56,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:56,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:56,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:56,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-01 00:05:56,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 00:05:56,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 00:05:56,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:05:56,547 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-10-01 00:05:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:57,048 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-01 00:05:57,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 00:05:57,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-10-01 00:05:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:57,049 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:05:57,049 INFO L226 Difference]: Without dead ends: 62 [2018-10-01 00:05:57,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:05:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-01 00:05:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-10-01 00:05:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-01 00:05:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-01 00:05:57,053 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-10-01 00:05:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:57,053 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-01 00:05:57,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 00:05:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-01 00:05:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 00:05:57,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:57,054 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-01 00:05:57,054 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:57,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-10-01 00:05:57,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:57,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:57,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:57,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:57,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:57,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:57,844 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 [2018-10-01 00:05:57,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:57,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-01 00:05:57,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:57,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:57,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:57,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-01 00:05:57,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:05:57,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:05:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-01 00:05:57,918 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-10-01 00:05:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:58,043 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-01 00:05:58,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 00:05:58,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-01 00:05:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:58,044 INFO L225 Difference]: With dead ends: 66 [2018-10-01 00:05:58,044 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:05:58,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-01 00:05:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:05:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 00:05:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 00:05:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-01 00:05:58,048 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-10-01 00:05:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:58,048 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-01 00:05:58,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:05:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-01 00:05:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 00:05:58,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:58,048 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-01 00:05:58,048 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:58,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-10-01 00:05:58,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:58,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:58,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:58,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:58,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:59,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:59,065 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 [2018-10-01 00:05:59,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:59,107 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-01 00:05:59,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:59,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:59,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:59,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-01 00:05:59,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:05:59,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:05:59,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-01 00:05:59,142 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-01 00:05:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:59,204 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-01 00:05:59,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 00:05:59,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-01 00:05:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:59,205 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:05:59,206 INFO L226 Difference]: Without dead ends: 44 [2018-10-01 00:05:59,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-01 00:05:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-01 00:05:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-01 00:05:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-01 00:05:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-01 00:05:59,209 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-10-01 00:05:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:59,210 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-01 00:05:59,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:05:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-01 00:05:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-01 00:05:59,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:59,210 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-10-01 00:05:59,210 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:59,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-10-01 00:05:59,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:59,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:59,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:59,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:59,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:59,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:59,722 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 [2018-10-01 00:05:59,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:59,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:59,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:59,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-01 00:05:59,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:05:59,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:05:59,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-01 00:05:59,820 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-10-01 00:06:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:00,355 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-01 00:06:00,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 00:06:00,356 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-10-01 00:06:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:00,357 INFO L225 Difference]: With dead ends: 68 [2018-10-01 00:06:00,357 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:06:00,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-01 00:06:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:06:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-10-01 00:06:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-01 00:06:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-01 00:06:00,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-10-01 00:06:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:00,363 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-01 00:06:00,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:06:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-01 00:06:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 00:06:00,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:00,363 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-01 00:06:00,364 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:00,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:00,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-10-01 00:06:00,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:00,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:00,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:00,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:00,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:01,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:01,154 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 [2018-10-01 00:06:01,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:01,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:01,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:01,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:01,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:01,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-01 00:06:01,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 00:06:01,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 00:06:01,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:06:01,223 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-10-01 00:06:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:01,540 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-01 00:06:01,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:06:01,540 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-01 00:06:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:01,541 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:06:01,541 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:06:01,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:06:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:06:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 00:06:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 00:06:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-01 00:06:01,544 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-10-01 00:06:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:01,544 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-01 00:06:01,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 00:06:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-01 00:06:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 00:06:01,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:01,544 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-01 00:06:01,545 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:01,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-10-01 00:06:01,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:01,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:01,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:01,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:01,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:01,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:01,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:01,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:01,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-01 00:06:01,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:01,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:01,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:01,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-01 00:06:01,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 00:06:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 00:06:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:06:01,858 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-10-01 00:06:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:01,923 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-01 00:06:01,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:06:01,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-01 00:06:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:01,924 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:06:01,925 INFO L226 Difference]: Without dead ends: 46 [2018-10-01 00:06:01,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:06:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-01 00:06:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-01 00:06:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-01 00:06:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-01 00:06:01,929 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-10-01 00:06:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:01,929 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-01 00:06:01,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 00:06:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-01 00:06:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-01 00:06:01,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:01,930 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-10-01 00:06:01,930 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:01,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-10-01 00:06:01,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:01,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:01,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:01,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:01,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:02,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:02,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:02,380 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:02,410 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:02,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:02,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:02,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:02,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-01 00:06:02,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 00:06:02,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 00:06:02,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:06:02,446 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-10-01 00:06:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:03,062 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-01 00:06:03,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:06:03,063 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-10-01 00:06:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:03,064 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:06:03,064 INFO L226 Difference]: Without dead ends: 68 [2018-10-01 00:06:03,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:06:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-01 00:06:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-10-01 00:06:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-01 00:06:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-01 00:06:03,068 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-10-01 00:06:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:03,069 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-01 00:06:03,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 00:06:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-01 00:06:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 00:06:03,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:03,069 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-01 00:06:03,070 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:03,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:03,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-10-01 00:06:03,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:03,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:03,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:03,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:03,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:03,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:03,776 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 [2018-10-01 00:06:03,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:03,833 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-01 00:06:03,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:03,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:03,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:03,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-01 00:06:03,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:06:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:06:03,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-01 00:06:03,864 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-10-01 00:06:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:03,993 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-01 00:06:03,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 00:06:03,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-01 00:06:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:03,994 INFO L225 Difference]: With dead ends: 72 [2018-10-01 00:06:03,994 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:06:03,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-01 00:06:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:06:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-01 00:06:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-01 00:06:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-01 00:06:03,998 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-10-01 00:06:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:03,999 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-01 00:06:03,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:06:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-01 00:06:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 00:06:03,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:03,999 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-01 00:06:04,000 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:04,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-10-01 00:06:04,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:04,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:04,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:04,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:04,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:04,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:04,372 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 [2018-10-01 00:06:04,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:04,561 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-01 00:06:04,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:04,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:04,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:04,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-01 00:06:04,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:06:04,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:06:04,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-01 00:06:04,608 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-01 00:06:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:04,748 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-01 00:06:04,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 00:06:04,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-01 00:06:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:04,749 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:06:04,750 INFO L226 Difference]: Without dead ends: 48 [2018-10-01 00:06:04,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-01 00:06:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-01 00:06:04,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-01 00:06:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-01 00:06:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-01 00:06:04,754 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-10-01 00:06:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:04,754 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-01 00:06:04,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:06:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-01 00:06:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-01 00:06:04,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:04,754 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-10-01 00:06:04,755 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:04,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:04,755 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-10-01 00:06:04,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:04,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:04,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:04,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:04,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:05,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:05,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:05,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:05,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:05,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:05,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-01 00:06:05,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:06:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:06:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-01 00:06:05,473 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-10-01 00:06:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:06,108 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-01 00:06:06,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 00:06:06,108 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-10-01 00:06:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:06,109 INFO L225 Difference]: With dead ends: 74 [2018-10-01 00:06:06,109 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:06:06,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-01 00:06:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:06:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-10-01 00:06:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-01 00:06:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-01 00:06:06,114 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-01 00:06:06,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:06,114 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-01 00:06:06,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:06:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-01 00:06:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 00:06:06,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:06,115 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-01 00:06:06,115 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:06,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:06,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-10-01 00:06:06,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:06,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:06,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:06,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:06,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:06,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:06,378 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 [2018-10-01 00:06:06,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:06,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:06,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:06,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:06,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:06,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-01 00:06:06,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 00:06:06,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 00:06:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:06:06,449 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-10-01 00:06:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:06,662 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-01 00:06:06,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 00:06:06,662 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-01 00:06:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:06,663 INFO L225 Difference]: With dead ends: 75 [2018-10-01 00:06:06,663 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:06:06,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:06:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:06:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-01 00:06:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 00:06:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-01 00:06:06,666 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-10-01 00:06:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:06,666 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-01 00:06:06,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 00:06:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-01 00:06:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 00:06:06,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:06,666 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-01 00:06:06,667 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:06,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-10-01 00:06:06,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:06,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:06,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:06,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:06,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:07,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:07,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:07,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:07,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-01 00:06:07,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:07,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:07,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:07,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-01 00:06:07,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 00:06:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 00:06:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:06:07,381 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-10-01 00:06:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:07,461 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-01 00:06:07,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 00:06:07,461 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-01 00:06:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:07,462 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:06:07,462 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 00:06:07,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:06:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 00:06:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-01 00:06:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-01 00:06:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-01 00:06:07,467 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-10-01 00:06:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:07,467 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-01 00:06:07,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 00:06:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-01 00:06:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-01 00:06:07,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:07,468 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-10-01 00:06:07,468 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:07,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:07,469 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-10-01 00:06:07,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:07,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:07,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:07,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:07,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:08,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:08,133 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 [2018-10-01 00:06:08,140 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:08,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:08,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:08,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:08,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:08,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-01 00:06:08,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 00:06:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 00:06:08,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:06:08,216 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-10-01 00:06:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:08,992 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-01 00:06:08,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 00:06:08,993 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-10-01 00:06:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:08,994 INFO L225 Difference]: With dead ends: 77 [2018-10-01 00:06:08,994 INFO L226 Difference]: Without dead ends: 74 [2018-10-01 00:06:08,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:06:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-01 00:06:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-10-01 00:06:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-01 00:06:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-01 00:06:08,997 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-10-01 00:06:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:08,998 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-01 00:06:08,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 00:06:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-01 00:06:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 00:06:08,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:08,998 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-01 00:06:08,999 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:08,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:08,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-10-01 00:06:08,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:08,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:09,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:09,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:09,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:09,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:09,369 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 [2018-10-01 00:06:09,394 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:09,426 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-01 00:06:09,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:09,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:09,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:09,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-01 00:06:09,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:06:09,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:06:09,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-01 00:06:09,459 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-01 00:06:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:09,616 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-01 00:06:09,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:06:09,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-01 00:06:09,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:09,617 INFO L225 Difference]: With dead ends: 78 [2018-10-01 00:06:09,617 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:06:09,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-01 00:06:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:06:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-01 00:06:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 00:06:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-01 00:06:09,621 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-10-01 00:06:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:09,621 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-01 00:06:09,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:06:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-01 00:06:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 00:06:09,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:09,622 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-01 00:06:09,622 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:09,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-10-01 00:06:09,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:09,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:09,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:09,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:09,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:09,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:09,948 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) [2018-10-01 00:06:09,959 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:09,992 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 00:06:09,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:09,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:10,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:10,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-01 00:06:10,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:06:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:06:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-01 00:06:10,024 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-01 00:06:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:10,185 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-01 00:06:10,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:06:10,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-01 00:06:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:10,186 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:06:10,186 INFO L226 Difference]: Without dead ends: 52 [2018-10-01 00:06:10,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-01 00:06:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-01 00:06:10,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-01 00:06:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-01 00:06:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-01 00:06:10,191 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-10-01 00:06:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:10,191 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-01 00:06:10,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:06:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-01 00:06:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-01 00:06:10,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:10,192 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-10-01 00:06:10,192 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:10,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-10-01 00:06:10,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:10,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:10,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:10,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:10,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:10,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:10,925 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 [2018-10-01 00:06:10,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:10,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:11,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:11,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-01 00:06:11,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:06:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:06:11,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-01 00:06:11,003 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-10-01 00:06:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:11,900 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-01 00:06:11,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:06:11,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-01 00:06:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:11,901 INFO L225 Difference]: With dead ends: 80 [2018-10-01 00:06:11,901 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 00:06:11,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-01 00:06:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 00:06:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-10-01 00:06:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-01 00:06:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-01 00:06:11,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-10-01 00:06:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:11,906 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-01 00:06:11,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:06:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-01 00:06:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 00:06:11,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:11,906 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-01 00:06:11,907 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:11,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-10-01 00:06:11,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:11,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:11,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:11,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:11,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:12,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:12,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:12,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:12,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:12,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:12,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:12,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:12,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-01 00:06:12,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 00:06:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 00:06:12,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:06:12,239 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-10-01 00:06:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:12,478 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-01 00:06:12,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 00:06:12,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-01 00:06:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:12,479 INFO L225 Difference]: With dead ends: 81 [2018-10-01 00:06:12,480 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:06:12,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:06:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:06:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 00:06:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 00:06:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-01 00:06:12,483 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-10-01 00:06:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:12,484 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-01 00:06:12,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 00:06:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-01 00:06:12,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 00:06:12,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:12,484 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-01 00:06:12,484 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:12,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-10-01 00:06:12,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:12,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:12,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:12,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:12,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:13,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:13,020 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 [2018-10-01 00:06:13,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:13,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-01 00:06:13,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:13,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:13,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:13,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-01 00:06:13,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 00:06:13,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 00:06:13,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:06:13,096 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-10-01 00:06:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:13,177 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-01 00:06:13,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 00:06:13,178 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-01 00:06:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:13,179 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:06:13,179 INFO L226 Difference]: Without dead ends: 54 [2018-10-01 00:06:13,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:06:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-01 00:06:13,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-01 00:06:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-01 00:06:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-01 00:06:13,182 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-10-01 00:06:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:13,182 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-01 00:06:13,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 00:06:13,182 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-01 00:06:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-01 00:06:13,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:13,183 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-10-01 00:06:13,183 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:13,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:13,183 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-10-01 00:06:13,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:13,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:13,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:13,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:13,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:13,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:13,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:13,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:13,663 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:13,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:13,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:13,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:13,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-01 00:06:13,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 00:06:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 00:06:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:06:13,747 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-10-01 00:06:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:14,736 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-10-01 00:06:14,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 00:06:14,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-10-01 00:06:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:14,737 INFO L225 Difference]: With dead ends: 83 [2018-10-01 00:06:14,737 INFO L226 Difference]: Without dead ends: 80 [2018-10-01 00:06:14,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:06:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-01 00:06:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-01 00:06:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-01 00:06:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-01 00:06:14,742 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-01 00:06:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:14,743 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-01 00:06:14,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 00:06:14,743 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-01 00:06:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 00:06:14,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:14,743 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-01 00:06:14,744 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:14,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-10-01 00:06:14,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:14,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:14,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:14,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:14,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:15,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:15,255 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 [2018-10-01 00:06:15,269 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:15,317 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-01 00:06:15,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:15,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:15,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:15,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-01 00:06:15,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 00:06:15,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 00:06:15,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-01 00:06:15,355 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-10-01 00:06:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:15,592 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-01 00:06:15,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 00:06:15,593 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-01 00:06:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:15,593 INFO L225 Difference]: With dead ends: 84 [2018-10-01 00:06:15,593 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:06:15,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-01 00:06:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:06:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-01 00:06:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-01 00:06:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-01 00:06:15,598 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-10-01 00:06:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:15,598 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-01 00:06:15,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 00:06:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-01 00:06:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 00:06:15,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:15,599 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-01 00:06:15,599 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:15,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-10-01 00:06:15,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:15,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:15,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:15,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:15,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:17,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:17,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:17,129 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:17,166 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-01 00:06:17,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:17,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:17,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:17,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-01 00:06:17,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 00:06:17,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 00:06:17,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-01 00:06:17,212 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-01 00:06:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:17,405 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-01 00:06:17,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 00:06:17,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-01 00:06:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:17,406 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:06:17,407 INFO L226 Difference]: Without dead ends: 56 [2018-10-01 00:06:17,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-01 00:06:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-01 00:06:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-01 00:06:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-01 00:06:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-01 00:06:17,411 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-10-01 00:06:17,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:17,411 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-01 00:06:17,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 00:06:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-01 00:06:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-01 00:06:17,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:17,411 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-10-01 00:06:17,411 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:17,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-10-01 00:06:17,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:17,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:17,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:17,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:17,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:19,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:19,740 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 [2018-10-01 00:06:19,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:19,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:19,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:19,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-01 00:06:19,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 00:06:19,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 00:06:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-01 00:06:19,815 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-10-01 00:06:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:20,697 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-01 00:06:20,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 00:06:20,698 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-10-01 00:06:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:20,699 INFO L225 Difference]: With dead ends: 86 [2018-10-01 00:06:20,699 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:06:20,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-01 00:06:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:06:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-10-01 00:06:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-01 00:06:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-01 00:06:20,705 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-10-01 00:06:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:20,705 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-01 00:06:20,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 00:06:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-01 00:06:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 00:06:20,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:20,705 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-01 00:06:20,706 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:20,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:20,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-10-01 00:06:20,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:20,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:20,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:20,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:20,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:21,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:21,011 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 [2018-10-01 00:06:21,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:21,052 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:21,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:21,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:21,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:21,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-01 00:06:21,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:06:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:06:21,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:06:21,090 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-10-01 00:06:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:21,342 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-01 00:06:21,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 00:06:21,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-01 00:06:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:21,343 INFO L225 Difference]: With dead ends: 87 [2018-10-01 00:06:21,344 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:06:21,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:06:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:06:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-01 00:06:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-01 00:06:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-01 00:06:21,348 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-10-01 00:06:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:21,349 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-01 00:06:21,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:06:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-01 00:06:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 00:06:21,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:21,349 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-01 00:06:21,350 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:21,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-10-01 00:06:21,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:21,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:21,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:21,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:21,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:21,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:21,923 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 [2018-10-01 00:06:21,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:21,969 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-01 00:06:21,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:21,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:22,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:22,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-01 00:06:22,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:06:22,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:06:22,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:06:22,003 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-10-01 00:06:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:22,152 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-01 00:06:22,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 00:06:22,152 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-01 00:06:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:22,153 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:06:22,153 INFO L226 Difference]: Without dead ends: 58 [2018-10-01 00:06:22,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:06:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-01 00:06:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-01 00:06:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-01 00:06:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-01 00:06:22,157 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-10-01 00:06:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:22,157 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-01 00:06:22,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:06:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-01 00:06:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-01 00:06:22,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:22,158 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-10-01 00:06:22,158 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:22,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:22,158 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-10-01 00:06:22,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:22,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:22,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:22,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:22,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:22,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:22,622 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 [2018-10-01 00:06:22,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:22,670 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:22,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:22,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:22,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:22,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-01 00:06:22,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:06:22,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:06:22,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:06:22,769 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-10-01 00:06:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:24,796 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-01 00:06:24,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 00:06:24,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-01 00:06:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:24,797 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:06:24,798 INFO L226 Difference]: Without dead ends: 86 [2018-10-01 00:06:24,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:06:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-01 00:06:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-01 00:06:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-01 00:06:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-01 00:06:24,805 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-10-01 00:06:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:24,805 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-01 00:06:24,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:06:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-01 00:06:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 00:06:24,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:24,806 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-01 00:06:24,806 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:24,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:24,807 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-10-01 00:06:24,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:24,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:24,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:24,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:24,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:26,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:26,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:26,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:26,148 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-01 00:06:26,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:26,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:26,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:26,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-01 00:06:26,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:06:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:06:26,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-01 00:06:26,182 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-10-01 00:06:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:26,393 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-01 00:06:26,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 00:06:26,393 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-01 00:06:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:26,394 INFO L225 Difference]: With dead ends: 90 [2018-10-01 00:06:26,394 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:06:26,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-01 00:06:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:06:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-01 00:06:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 00:06:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-01 00:06:26,400 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-10-01 00:06:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:26,400 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-01 00:06:26,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:06:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-01 00:06:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 00:06:26,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:26,401 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-01 00:06:26,401 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:26,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-10-01 00:06:26,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:26,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:26,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:26,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:26,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:26,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:26,768 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 [2018-10-01 00:06:26,775 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:26,816 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-01 00:06:26,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:26,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:26,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:26,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-01 00:06:26,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:06:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:06:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-01 00:06:26,849 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-01 00:06:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:27,018 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-01 00:06:27,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 00:06:27,018 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-01 00:06:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:27,019 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:06:27,019 INFO L226 Difference]: Without dead ends: 60 [2018-10-01 00:06:27,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-01 00:06:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-01 00:06:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-01 00:06:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-01 00:06:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-01 00:06:27,023 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-10-01 00:06:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:27,023 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-01 00:06:27,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:06:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-01 00:06:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-01 00:06:27,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:27,024 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-10-01 00:06:27,024 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:27,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-10-01 00:06:27,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:27,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:27,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:27,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:27,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:27,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:27,522 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 [2018-10-01 00:06:27,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:27,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:27,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:27,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-01 00:06:27,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:06:27,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:06:27,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-01 00:06:27,611 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-10-01 00:06:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:28,725 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-01 00:06:28,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 00:06:28,726 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-10-01 00:06:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:28,727 INFO L225 Difference]: With dead ends: 92 [2018-10-01 00:06:28,727 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:06:28,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-01 00:06:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:06:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-10-01 00:06:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-01 00:06:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-01 00:06:28,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-10-01 00:06:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:28,732 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-01 00:06:28,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:06:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-01 00:06:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 00:06:28,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:28,733 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-01 00:06:28,733 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:28,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-10-01 00:06:28,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:28,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:28,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:28,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:28,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:29,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:29,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:29,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:29,121 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:29,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:29,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:29,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:29,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-01 00:06:29,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 00:06:29,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 00:06:29,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:06:29,164 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-10-01 00:06:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:29,452 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-01 00:06:29,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:06:29,453 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-01 00:06:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:29,453 INFO L225 Difference]: With dead ends: 93 [2018-10-01 00:06:29,453 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:06:29,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:06:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:06:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-01 00:06:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-01 00:06:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-01 00:06:29,458 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-10-01 00:06:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:29,459 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-01 00:06:29,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 00:06:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-01 00:06:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 00:06:29,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:29,459 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-01 00:06:29,459 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:29,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-10-01 00:06:29,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:29,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:29,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:29,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:29,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:29,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:29,834 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 [2018-10-01 00:06:29,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:29,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-01 00:06:29,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:29,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:29,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:29,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-01 00:06:29,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 00:06:29,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 00:06:29,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:06:29,922 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-10-01 00:06:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:30,042 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-01 00:06:30,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:06:30,043 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-01 00:06:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:30,044 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:06:30,044 INFO L226 Difference]: Without dead ends: 62 [2018-10-01 00:06:30,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:06:30,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-01 00:06:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-01 00:06:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-01 00:06:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-01 00:06:30,049 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-10-01 00:06:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:30,049 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-01 00:06:30,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 00:06:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-01 00:06:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-01 00:06:30,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:30,050 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-10-01 00:06:30,050 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:30,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-10-01 00:06:30,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:30,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:30,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:30,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:30,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:30,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:30,542 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 [2018-10-01 00:06:30,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:30,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:30,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:30,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:30,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:30,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-01 00:06:30,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 00:06:30,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 00:06:30,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:06:30,683 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-10-01 00:06:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:31,793 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-10-01 00:06:31,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:06:31,794 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-10-01 00:06:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:31,795 INFO L225 Difference]: With dead ends: 95 [2018-10-01 00:06:31,795 INFO L226 Difference]: Without dead ends: 92 [2018-10-01 00:06:31,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:06:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-01 00:06:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-10-01 00:06:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-01 00:06:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-01 00:06:31,800 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-10-01 00:06:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:31,801 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-01 00:06:31,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 00:06:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-01 00:06:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 00:06:31,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:31,801 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-01 00:06:31,802 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:31,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:31,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-10-01 00:06:31,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:31,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:31,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:31,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:31,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:32,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:32,509 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 [2018-10-01 00:06:32,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:32,561 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-01 00:06:32,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:32,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:32,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:32,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-01 00:06:32,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 00:06:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 00:06:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-01 00:06:32,614 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-10-01 00:06:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:32,883 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-01 00:06:32,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 00:06:32,884 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-01 00:06:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:32,885 INFO L225 Difference]: With dead ends: 96 [2018-10-01 00:06:32,885 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:06:32,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-01 00:06:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:06:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-01 00:06:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-01 00:06:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-01 00:06:32,891 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-10-01 00:06:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:32,891 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-01 00:06:32,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 00:06:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-01 00:06:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 00:06:32,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:32,892 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-01 00:06:32,893 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:32,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-10-01 00:06:32,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:32,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:32,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:32,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:32,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:34,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:34,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:34,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:34,308 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-01 00:06:34,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:34,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:34,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:34,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-01 00:06:34,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 00:06:34,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 00:06:34,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-01 00:06:34,343 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-01 00:06:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:34,464 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-01 00:06:34,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 00:06:34,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-01 00:06:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:34,466 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:06:34,466 INFO L226 Difference]: Without dead ends: 64 [2018-10-01 00:06:34,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-01 00:06:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-01 00:06:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-01 00:06:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-01 00:06:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-01 00:06:34,473 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-10-01 00:06:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:34,474 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-01 00:06:34,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 00:06:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-01 00:06:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-01 00:06:34,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:34,474 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-10-01 00:06:34,475 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:34,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-10-01 00:06:34,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:34,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:34,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:34,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:34,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:35,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:35,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:35,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:35,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:35,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:35,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-01 00:06:35,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 00:06:35,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 00:06:35,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-01 00:06:35,461 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-10-01 00:06:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:36,636 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-01 00:06:36,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 00:06:36,637 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-10-01 00:06:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:36,638 INFO L225 Difference]: With dead ends: 98 [2018-10-01 00:06:36,638 INFO L226 Difference]: Without dead ends: 95 [2018-10-01 00:06:36,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-01 00:06:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-01 00:06:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-10-01 00:06:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-01 00:06:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-01 00:06:36,645 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-10-01 00:06:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:36,645 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-01 00:06:36,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 00:06:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-01 00:06:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 00:06:36,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:36,646 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-01 00:06:36,646 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:36,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:36,646 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-10-01 00:06:36,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:36,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:36,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:36,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:36,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:37,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:37,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:37,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:37,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:37,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:37,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:37,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:37,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-01 00:06:37,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 00:06:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 00:06:37,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:06:37,561 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-10-01 00:06:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:37,889 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-01 00:06:37,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 00:06:37,890 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-01 00:06:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:37,890 INFO L225 Difference]: With dead ends: 99 [2018-10-01 00:06:37,891 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:06:37,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:06:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:06:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-01 00:06:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-01 00:06:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-01 00:06:37,895 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-10-01 00:06:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:37,895 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-01 00:06:37,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 00:06:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-01 00:06:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 00:06:37,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:37,896 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-01 00:06:37,896 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:37,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:37,896 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-10-01 00:06:37,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:37,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:37,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:37,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:37,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:38,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:38,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:38,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:38,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-01 00:06:38,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:38,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:38,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:38,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-01 00:06:38,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 00:06:38,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 00:06:38,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:06:38,469 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-10-01 00:06:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:38,565 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-01 00:06:38,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 00:06:38,566 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-01 00:06:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:38,567 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:06:38,567 INFO L226 Difference]: Without dead ends: 66 [2018-10-01 00:06:38,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:06:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-01 00:06:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-01 00:06:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-01 00:06:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-01 00:06:38,571 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-10-01 00:06:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:38,571 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-01 00:06:38,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 00:06:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-01 00:06:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-01 00:06:38,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:38,571 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-10-01 00:06:38,572 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:38,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-10-01 00:06:38,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:38,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:38,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:38,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:38,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:39,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:39,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:39,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:39,196 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:39,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:39,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:39,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:39,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-01 00:06:39,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 00:06:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 00:06:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:06:39,245 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-10-01 00:06:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:40,491 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-01 00:06:40,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 00:06:40,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-10-01 00:06:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:40,493 INFO L225 Difference]: With dead ends: 101 [2018-10-01 00:06:40,493 INFO L226 Difference]: Without dead ends: 98 [2018-10-01 00:06:40,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:06:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-01 00:06:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-10-01 00:06:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-01 00:06:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-01 00:06:40,498 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-01 00:06:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:40,498 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-01 00:06:40,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 00:06:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-01 00:06:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-01 00:06:40,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:40,499 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-01 00:06:40,499 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:40,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:40,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-10-01 00:06:40,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:40,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:40,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:40,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:40,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:40,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:40,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:40,890 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:40,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-01 00:06:40,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:40,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:40,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:40,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-01 00:06:40,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:06:40,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:06:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-01 00:06:40,991 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-10-01 00:06:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:41,461 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-01 00:06:41,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:06:41,461 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-01 00:06:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:41,462 INFO L225 Difference]: With dead ends: 102 [2018-10-01 00:06:41,462 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:06:41,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-01 00:06:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:06:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-01 00:06:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-01 00:06:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-01 00:06:41,468 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-10-01 00:06:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:41,468 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-01 00:06:41,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:06:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-01 00:06:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-01 00:06:41,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:41,469 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-01 00:06:41,469 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:41,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-10-01 00:06:41,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:41,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:41,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:41,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:41,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:41,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:41,908 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 [2018-10-01 00:06:41,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:41,964 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-01 00:06:41,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:41,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:41,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:41,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-01 00:06:41,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:06:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:06:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-01 00:06:41,999 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-01 00:06:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:42,099 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-01 00:06:42,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:06:42,100 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-01 00:06:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:42,100 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:06:42,100 INFO L226 Difference]: Without dead ends: 68 [2018-10-01 00:06:42,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-01 00:06:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-01 00:06:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-01 00:06:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-01 00:06:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-01 00:06:42,105 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-10-01 00:06:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:42,105 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-01 00:06:42,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:06:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-01 00:06:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-01 00:06:42,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:42,105 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-10-01 00:06:42,106 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:42,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-10-01 00:06:42,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:42,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:42,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:42,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:42,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:42,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:42,948 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 [2018-10-01 00:06:42,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:43,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:43,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:43,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-01 00:06:43,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:06:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:06:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-01 00:06:43,095 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-10-01 00:06:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:44,566 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-01 00:06:44,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:06:44,566 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-10-01 00:06:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:44,567 INFO L225 Difference]: With dead ends: 104 [2018-10-01 00:06:44,567 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 00:06:44,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-01 00:06:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 00:06:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-10-01 00:06:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-01 00:06:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-01 00:06:44,572 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-10-01 00:06:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:44,573 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-01 00:06:44,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:06:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-01 00:06:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 00:06:44,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:44,573 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-01 00:06:44,573 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:44,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-10-01 00:06:44,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:44,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:44,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:44,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:44,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:44,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:44,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:44,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:45,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:45,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:45,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:45,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:45,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-01 00:06:45,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 00:06:45,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 00:06:45,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:06:45,070 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-10-01 00:06:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:45,406 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-01 00:06:45,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:06:45,407 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-01 00:06:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:45,407 INFO L225 Difference]: With dead ends: 105 [2018-10-01 00:06:45,408 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:06:45,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:06:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:06:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-01 00:06:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-01 00:06:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-01 00:06:45,412 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-10-01 00:06:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:45,413 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-01 00:06:45,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 00:06:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-01 00:06:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 00:06:45,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:45,413 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-01 00:06:45,413 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:45,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-10-01 00:06:45,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:45,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:45,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:45,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:45,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:46,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:46,190 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 [2018-10-01 00:06:46,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:46,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-01 00:06:46,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:46,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:46,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:46,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-01 00:06:46,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 00:06:46,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 00:06:46,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:06:46,298 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-10-01 00:06:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:46,527 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-01 00:06:46,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:06:46,528 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-01 00:06:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:46,529 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:06:46,529 INFO L226 Difference]: Without dead ends: 70 [2018-10-01 00:06:46,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:06:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-01 00:06:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-01 00:06:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-01 00:06:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-01 00:06:46,535 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-10-01 00:06:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:46,535 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-01 00:06:46,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 00:06:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-01 00:06:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-01 00:06:46,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:46,536 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-10-01 00:06:46,536 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:46,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:46,537 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-10-01 00:06:46,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:46,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:46,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:46,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:46,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:47,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:47,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:47,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:47,225 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:47,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:47,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:47,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:47,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-01 00:06:47,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 00:06:47,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 00:06:47,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:06:47,282 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-10-01 00:06:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:50,085 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-10-01 00:06:50,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:06:50,085 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-10-01 00:06:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:50,086 INFO L225 Difference]: With dead ends: 107 [2018-10-01 00:06:50,086 INFO L226 Difference]: Without dead ends: 104 [2018-10-01 00:06:50,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:06:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-01 00:06:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-10-01 00:06:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-01 00:06:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-01 00:06:50,091 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-10-01 00:06:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:50,092 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-01 00:06:50,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 00:06:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-01 00:06:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-01 00:06:50,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:50,092 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-01 00:06:50,092 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:50,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-10-01 00:06:50,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:50,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:50,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:50,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:50,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:50,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:50,695 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 [2018-10-01 00:06:50,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:50,758 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-01 00:06:50,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:50,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:50,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:50,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-01 00:06:50,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:06:50,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:06:50,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-01 00:06:50,795 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-10-01 00:06:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:51,125 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-01 00:06:51,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 00:06:51,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-01 00:06:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:51,126 INFO L225 Difference]: With dead ends: 108 [2018-10-01 00:06:51,127 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:06:51,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-01 00:06:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:06:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-01 00:06:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-01 00:06:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-01 00:06:51,133 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-10-01 00:06:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:51,133 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-01 00:06:51,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:06:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-01 00:06:51,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-01 00:06:51,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:51,134 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-01 00:06:51,134 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:51,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:51,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-10-01 00:06:51,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:51,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:51,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:51,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:51,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:51,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:51,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:51,674 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:51,721 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-01 00:06:51,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:51,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:51,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:51,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-01 00:06:51,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:06:51,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:06:51,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-01 00:06:51,762 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-01 00:06:51,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:51,884 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-01 00:06:51,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 00:06:51,884 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-01 00:06:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:51,885 INFO L225 Difference]: With dead ends: 75 [2018-10-01 00:06:51,885 INFO L226 Difference]: Without dead ends: 72 [2018-10-01 00:06:51,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-01 00:06:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-01 00:06:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-01 00:06:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-01 00:06:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-01 00:06:51,892 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-10-01 00:06:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:51,892 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-01 00:06:51,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:06:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-01 00:06:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-01 00:06:51,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:51,893 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-10-01 00:06:51,893 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:51,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:51,893 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-10-01 00:06:51,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:51,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:51,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:51,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:51,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:52,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:52,820 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 [2018-10-01 00:06:52,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:52,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:52,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:52,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-01 00:06:52,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:06:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:06:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-01 00:06:52,913 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-10-01 00:06:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:54,400 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-01 00:06:54,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 00:06:54,401 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-10-01 00:06:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:54,402 INFO L225 Difference]: With dead ends: 110 [2018-10-01 00:06:54,402 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 00:06:54,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-01 00:06:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 00:06:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-10-01 00:06:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-01 00:06:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-10-01 00:06:54,407 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-10-01 00:06:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:54,407 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-10-01 00:06:54,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:06:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-10-01 00:06:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:06:54,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:54,408 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-01 00:06:54,408 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:54,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-10-01 00:06:54,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:54,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:54,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:54,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:54,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:54,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:54,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:54,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:54,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:54,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:54,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:55,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:55,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-01 00:06:55,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 00:06:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 00:06:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:06:55,003 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-10-01 00:06:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:55,386 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-01 00:06:55,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 00:06:55,386 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-01 00:06:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:55,387 INFO L225 Difference]: With dead ends: 111 [2018-10-01 00:06:55,387 INFO L226 Difference]: Without dead ends: 73 [2018-10-01 00:06:55,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:06:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-01 00:06:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-01 00:06:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 00:06:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-01 00:06:55,393 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-10-01 00:06:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:55,393 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-01 00:06:55,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 00:06:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-01 00:06:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:06:55,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:55,394 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-01 00:06:55,394 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:55,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-10-01 00:06:55,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:55,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:55,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:55,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:55,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:55,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:55,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:06:55,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:55,969 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-01 00:06:55,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:55,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:56,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-01 00:06:56,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 00:06:56,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 00:06:56,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:06:56,006 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-10-01 00:06:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:56,134 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-01 00:06:56,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 00:06:56,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-01 00:06:56,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:56,136 INFO L225 Difference]: With dead ends: 77 [2018-10-01 00:06:56,136 INFO L226 Difference]: Without dead ends: 74 [2018-10-01 00:06:56,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:06:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-01 00:06:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-01 00:06:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-01 00:06:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-10-01 00:06:56,142 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-10-01 00:06:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:56,142 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-10-01 00:06:56,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 00:06:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-10-01 00:06:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-01 00:06:56,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:56,143 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-10-01 00:06:56,143 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:56,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-10-01 00:06:56,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:56,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:56,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:56,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:56,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:56,826 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 [2018-10-01 00:06:56,833 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:56,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:56,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:56,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:56,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-01 00:06:56,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 00:06:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 00:06:56,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:06:56,919 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-10-01 00:06:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:58,684 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-01 00:06:58,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 00:06:58,685 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-10-01 00:06:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:58,686 INFO L225 Difference]: With dead ends: 113 [2018-10-01 00:06:58,686 INFO L226 Difference]: Without dead ends: 110 [2018-10-01 00:06:58,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:06:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-01 00:06:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-10-01 00:06:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-01 00:06:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-01 00:06:58,692 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-10-01 00:06:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:58,692 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-01 00:06:58,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 00:06:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-01 00:06:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 00:06:58,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:58,693 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-01 00:06:58,693 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:58,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-10-01 00:06:58,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:58,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:58,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:59,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:59,568 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 [2018-10-01 00:06:59,576 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:59,628 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-01 00:06:59,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:59,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:59,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:59,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-01 00:06:59,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:06:59,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:06:59,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-01 00:06:59,677 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-10-01 00:07:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:00,032 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-01 00:07:00,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 00:07:00,032 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-01 00:07:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:00,033 INFO L225 Difference]: With dead ends: 114 [2018-10-01 00:07:00,033 INFO L226 Difference]: Without dead ends: 75 [2018-10-01 00:07:00,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-01 00:07:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-01 00:07:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-01 00:07:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-01 00:07:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-01 00:07:00,039 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-10-01 00:07:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:00,039 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-01 00:07:00,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:07:00,039 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-01 00:07:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 00:07:00,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:00,040 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-01 00:07:00,040 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:00,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-10-01 00:07:00,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:00,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:00,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:00,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:00,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:00,563 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 [2018-10-01 00:07:00,571 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:00,648 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-01 00:07:00,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:00,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:00,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:00,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-01 00:07:00,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:07:00,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:07:00,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-01 00:07:00,689 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-01 00:07:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:00,806 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-01 00:07:00,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 00:07:00,806 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-01 00:07:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:00,807 INFO L225 Difference]: With dead ends: 79 [2018-10-01 00:07:00,807 INFO L226 Difference]: Without dead ends: 76 [2018-10-01 00:07:00,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-01 00:07:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-01 00:07:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-01 00:07:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-01 00:07:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-01 00:07:00,814 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-10-01 00:07:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:00,815 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-01 00:07:00,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:07:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-01 00:07:00,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-01 00:07:00,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:00,815 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-10-01 00:07:00,816 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:00,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:00,816 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-10-01 00:07:00,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:00,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:00,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:00,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:01,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:01,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:07:01,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:01,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:01,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:01,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-01 00:07:01,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:07:01,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:07:01,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-01 00:07:01,965 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-10-01 00:07:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:03,886 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-01 00:07:03,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 00:07:03,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-10-01 00:07:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:03,888 INFO L225 Difference]: With dead ends: 116 [2018-10-01 00:07:03,888 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 00:07:03,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-01 00:07:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 00:07:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-10-01 00:07:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-01 00:07:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-01 00:07:03,895 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-10-01 00:07:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:03,895 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-01 00:07:03,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:07:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-01 00:07:03,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 00:07:03,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:03,895 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-01 00:07:03,896 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:03,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:03,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-10-01 00:07:03,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:03,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:03,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:03,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:03,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:04,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:04,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:07:04,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:04,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:04,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:04,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:04,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:04,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-01 00:07:04,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 00:07:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 00:07:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:07:04,509 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-10-01 00:07:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:04,872 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-01 00:07:04,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 00:07:04,873 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-01 00:07:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:04,873 INFO L225 Difference]: With dead ends: 117 [2018-10-01 00:07:04,874 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 00:07:04,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:07:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 00:07:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-01 00:07:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-01 00:07:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-01 00:07:04,879 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-10-01 00:07:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:04,879 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-01 00:07:04,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 00:07:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-01 00:07:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 00:07:04,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:04,879 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-01 00:07:04,879 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:04,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:04,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-10-01 00:07:04,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:04,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:04,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:04,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:04,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:05,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:05,435 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 [2018-10-01 00:07:05,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:05,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-01 00:07:05,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:05,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:05,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:05,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-01 00:07:05,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 00:07:05,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 00:07:05,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:07:05,540 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-10-01 00:07:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:05,707 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-01 00:07:05,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 00:07:05,708 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-01 00:07:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:05,708 INFO L225 Difference]: With dead ends: 81 [2018-10-01 00:07:05,708 INFO L226 Difference]: Without dead ends: 78 [2018-10-01 00:07:05,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:07:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-01 00:07:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-01 00:07:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-01 00:07:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-01 00:07:05,714 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-10-01 00:07:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:05,714 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-01 00:07:05,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 00:07:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-01 00:07:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-01 00:07:05,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:05,714 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-10-01 00:07:05,715 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:05,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:05,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-10-01 00:07:05,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:05,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:05,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:05,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:05,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:06,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:06,497 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 [2018-10-01 00:07:06,507 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:06,556 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:06,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:06,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:06,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:06,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-01 00:07:06,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 00:07:06,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 00:07:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:07:06,597 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-10-01 00:07:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:08,511 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-10-01 00:07:08,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 00:07:08,511 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-10-01 00:07:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:08,512 INFO L225 Difference]: With dead ends: 119 [2018-10-01 00:07:08,512 INFO L226 Difference]: Without dead ends: 116 [2018-10-01 00:07:08,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:07:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-01 00:07:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-10-01 00:07:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-01 00:07:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-01 00:07:08,518 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-10-01 00:07:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:08,518 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-01 00:07:08,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 00:07:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-01 00:07:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 00:07:08,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:08,518 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-01 00:07:08,519 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:08,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:08,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-10-01 00:07:08,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:08,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:08,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:08,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:08,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:09,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:09,099 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 [2018-10-01 00:07:09,107 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:09,162 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-01 00:07:09,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:09,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:09,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:09,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-01 00:07:09,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 00:07:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 00:07:09,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-01 00:07:09,213 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-10-01 00:07:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:09,741 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-01 00:07:09,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 00:07:09,741 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-01 00:07:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:09,742 INFO L225 Difference]: With dead ends: 120 [2018-10-01 00:07:09,742 INFO L226 Difference]: Without dead ends: 79 [2018-10-01 00:07:09,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-01 00:07:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-01 00:07:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-01 00:07:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-01 00:07:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-01 00:07:09,749 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-10-01 00:07:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:09,750 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-01 00:07:09,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 00:07:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-01 00:07:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 00:07:09,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:09,750 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-01 00:07:09,751 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:09,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:09,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-10-01 00:07:09,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:09,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:09,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:09,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:09,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:10,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:10,339 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 [2018-10-01 00:07:10,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:10,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-01 00:07:10,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:10,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:10,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:10,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-01 00:07:10,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 00:07:10,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 00:07:10,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-01 00:07:10,441 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-01 00:07:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:10,563 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-10-01 00:07:10,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 00:07:10,563 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-01 00:07:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:10,564 INFO L225 Difference]: With dead ends: 83 [2018-10-01 00:07:10,564 INFO L226 Difference]: Without dead ends: 80 [2018-10-01 00:07:10,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-01 00:07:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-01 00:07:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-01 00:07:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-01 00:07:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-01 00:07:10,570 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-10-01 00:07:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:10,571 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-01 00:07:10,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 00:07:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-01 00:07:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-01 00:07:10,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:10,571 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-10-01 00:07:10,571 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:10,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-10-01 00:07:10,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:10,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:10,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:10,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:10,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:11,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:11,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:07:11,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:11,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:11,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:11,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-01 00:07:11,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 00:07:11,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 00:07:11,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-01 00:07:11,485 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-10-01 00:07:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:13,507 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-01 00:07:13,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 00:07:13,507 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-10-01 00:07:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:13,508 INFO L225 Difference]: With dead ends: 122 [2018-10-01 00:07:13,508 INFO L226 Difference]: Without dead ends: 119 [2018-10-01 00:07:13,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-01 00:07:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-01 00:07:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-10-01 00:07:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-01 00:07:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-01 00:07:13,515 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-10-01 00:07:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:13,515 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-01 00:07:13,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 00:07:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-01 00:07:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 00:07:13,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:13,516 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-01 00:07:13,516 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:13,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:13,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-10-01 00:07:13,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:13,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:13,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:13,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:13,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:14,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:14,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:07:14,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:14,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:14,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:14,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:14,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:14,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-01 00:07:14,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:07:14,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:07:14,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:07:14,235 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-10-01 00:07:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:14,652 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-01 00:07:14,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 00:07:14,653 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-01 00:07:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:14,654 INFO L225 Difference]: With dead ends: 123 [2018-10-01 00:07:14,654 INFO L226 Difference]: Without dead ends: 81 [2018-10-01 00:07:14,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:07:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-01 00:07:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-01 00:07:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-01 00:07:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-01 00:07:14,660 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-10-01 00:07:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:14,660 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-01 00:07:14,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:07:14,660 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-01 00:07:14,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 00:07:14,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:14,661 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-01 00:07:14,661 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:14,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-10-01 00:07:14,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:14,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:14,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:14,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:14,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:15,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:15,298 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 [2018-10-01 00:07:15,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:15,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-01 00:07:15,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:15,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:15,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:15,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-01 00:07:15,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:07:15,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:07:15,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:07:15,398 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-10-01 00:07:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:15,515 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-01 00:07:15,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 00:07:15,516 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-01 00:07:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:15,516 INFO L225 Difference]: With dead ends: 85 [2018-10-01 00:07:15,516 INFO L226 Difference]: Without dead ends: 82 [2018-10-01 00:07:15,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:07:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-01 00:07:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-01 00:07:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-01 00:07:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-01 00:07:15,521 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-10-01 00:07:15,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:15,521 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-01 00:07:15,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:07:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-01 00:07:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-01 00:07:15,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:15,522 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-10-01 00:07:15,522 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:15,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:15,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-10-01 00:07:15,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:15,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:15,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:15,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:15,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:16,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:16,399 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 [2018-10-01 00:07:16,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:16,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:16,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:16,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:16,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:16,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-01 00:07:16,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:07:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:07:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:07:16,496 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-10-01 00:07:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:18,629 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-01 00:07:18,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 00:07:18,630 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-10-01 00:07:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:18,630 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:07:18,630 INFO L226 Difference]: Without dead ends: 122 [2018-10-01 00:07:18,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:07:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-01 00:07:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-10-01 00:07:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 00:07:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-01 00:07:18,636 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-10-01 00:07:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:18,636 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-01 00:07:18,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:07:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-01 00:07:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 00:07:18,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:18,637 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-01 00:07:18,637 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:18,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:18,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-10-01 00:07:18,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:18,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:18,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:18,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:18,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:19,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:19,341 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 [2018-10-01 00:07:19,349 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:19,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-01 00:07:19,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:19,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:19,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:19,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-01 00:07:19,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 00:07:19,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 00:07:19,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-01 00:07:19,449 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-10-01 00:07:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:19,946 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-01 00:07:19,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:07:19,946 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-01 00:07:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:19,947 INFO L225 Difference]: With dead ends: 126 [2018-10-01 00:07:19,947 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:07:19,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-01 00:07:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:07:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-01 00:07:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-01 00:07:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-01 00:07:19,953 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-10-01 00:07:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:19,953 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-01 00:07:19,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 00:07:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-01 00:07:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 00:07:19,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:19,954 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-01 00:07:19,954 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:19,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:19,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-10-01 00:07:19,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:19,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:19,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:19,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:19,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:20,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:20,619 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 [2018-10-01 00:07:20,626 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:20,685 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-01 00:07:20,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:20,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:20,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:20,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-01 00:07:20,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 00:07:20,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 00:07:20,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-01 00:07:20,723 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-01 00:07:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:20,843 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-10-01 00:07:20,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:07:20,844 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-01 00:07:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:20,844 INFO L225 Difference]: With dead ends: 87 [2018-10-01 00:07:20,844 INFO L226 Difference]: Without dead ends: 84 [2018-10-01 00:07:20,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-01 00:07:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-01 00:07:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-01 00:07:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 00:07:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-01 00:07:20,850 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-10-01 00:07:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:20,850 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-01 00:07:20,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 00:07:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-01 00:07:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-01 00:07:20,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:20,851 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-10-01 00:07:20,851 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:20,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-10-01 00:07:20,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:20,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:20,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:20,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:20,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:21,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:21,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:21,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:21,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:21,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:21,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-01 00:07:21,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 00:07:21,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 00:07:21,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-01 00:07:21,813 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-10-01 00:07:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:24,037 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-01 00:07:24,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:07:24,037 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-10-01 00:07:24,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:24,038 INFO L225 Difference]: With dead ends: 128 [2018-10-01 00:07:24,038 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 00:07:24,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-01 00:07:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 00:07:24,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-10-01 00:07:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-01 00:07:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-01 00:07:24,043 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-01 00:07:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:24,043 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-01 00:07:24,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 00:07:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-01 00:07:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 00:07:24,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:24,044 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-01 00:07:24,044 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:24,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:24,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-10-01 00:07:24,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:24,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:24,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:24,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:24,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:24,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:24,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:24,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:24,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:24,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:24,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:24,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:24,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-01 00:07:24,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 00:07:24,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 00:07:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:07:24,763 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-10-01 00:07:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:25,102 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-01 00:07:25,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:07:25,102 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-01 00:07:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:25,103 INFO L225 Difference]: With dead ends: 129 [2018-10-01 00:07:25,103 INFO L226 Difference]: Without dead ends: 85 [2018-10-01 00:07:25,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:07:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-01 00:07:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-01 00:07:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-01 00:07:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-01 00:07:25,110 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-10-01 00:07:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:25,110 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-01 00:07:25,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 00:07:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-01 00:07:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 00:07:25,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:25,111 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-01 00:07:25,111 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:25,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:25,112 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-10-01 00:07:25,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:25,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:25,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:25,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:25,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:25,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:25,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:25,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:26,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-01 00:07:26,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:26,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:26,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:26,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-01 00:07:26,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 00:07:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 00:07:26,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:07:26,058 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-10-01 00:07:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:26,199 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-01 00:07:26,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:07:26,200 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-01 00:07:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:26,201 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:07:26,201 INFO L226 Difference]: Without dead ends: 86 [2018-10-01 00:07:26,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:07:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-01 00:07:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-01 00:07:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-01 00:07:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-01 00:07:26,208 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-10-01 00:07:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:26,208 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-01 00:07:26,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 00:07:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-01 00:07:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-01 00:07:26,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:26,209 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-10-01 00:07:26,209 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:26,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-10-01 00:07:26,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:26,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:26,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:26,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:26,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:27,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:27,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:27,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:27,200 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:27,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:27,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:27,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:27,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-01 00:07:27,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 00:07:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 00:07:27,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:07:27,243 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-01 00:07:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:29,593 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-01 00:07:29,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:07:29,593 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-01 00:07:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:29,594 INFO L225 Difference]: With dead ends: 131 [2018-10-01 00:07:29,594 INFO L226 Difference]: Without dead ends: 128 [2018-10-01 00:07:29,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:07:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-01 00:07:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-10-01 00:07:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 00:07:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-01 00:07:29,601 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-10-01 00:07:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:29,602 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-01 00:07:29,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 00:07:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-01 00:07:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 00:07:29,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:29,603 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-01 00:07:29,603 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:29,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-10-01 00:07:29,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:29,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:29,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:29,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:29,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:30,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:30,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:30,366 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:30,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-01 00:07:30,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:30,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:30,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:30,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-01 00:07:30,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 00:07:30,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 00:07:30,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-01 00:07:30,471 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-10-01 00:07:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:30,912 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-01 00:07:30,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:07:30,912 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-01 00:07:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:30,913 INFO L225 Difference]: With dead ends: 132 [2018-10-01 00:07:30,913 INFO L226 Difference]: Without dead ends: 87 [2018-10-01 00:07:30,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-01 00:07:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-01 00:07:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-01 00:07:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-01 00:07:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-01 00:07:30,920 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-10-01 00:07:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:30,921 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-01 00:07:30,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 00:07:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-01 00:07:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 00:07:30,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:30,921 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-01 00:07:30,922 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:30,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:30,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-10-01 00:07:30,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:30,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:30,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:30,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:30,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:31,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:31,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:31,678 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:31,738 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-01 00:07:31,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:31,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:31,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:31,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-01 00:07:31,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 00:07:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 00:07:31,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-01 00:07:31,788 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-01 00:07:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:31,921 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-01 00:07:31,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:07:31,922 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-01 00:07:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:31,922 INFO L225 Difference]: With dead ends: 91 [2018-10-01 00:07:31,923 INFO L226 Difference]: Without dead ends: 88 [2018-10-01 00:07:31,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-01 00:07:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-01 00:07:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-01 00:07:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 00:07:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-01 00:07:31,930 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-10-01 00:07:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:31,931 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-01 00:07:31,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 00:07:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-01 00:07:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-01 00:07:31,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:31,931 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-10-01 00:07:31,932 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:31,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-10-01 00:07:31,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:31,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:31,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:31,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:31,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:32,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:32,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:32,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:32,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:33,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:33,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-01 00:07:33,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 00:07:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 00:07:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-01 00:07:33,034 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-10-01 00:07:35,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:35,486 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-01 00:07:35,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:07:35,486 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-10-01 00:07:35,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:35,487 INFO L225 Difference]: With dead ends: 134 [2018-10-01 00:07:35,487 INFO L226 Difference]: Without dead ends: 131 [2018-10-01 00:07:35,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-01 00:07:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-01 00:07:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-10-01 00:07:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 00:07:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-01 00:07:35,493 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-10-01 00:07:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:35,493 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-01 00:07:35,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 00:07:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-01 00:07:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:07:35,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:35,494 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-01 00:07:35,494 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:35,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:35,494 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-10-01 00:07:35,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:35,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:35,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:35,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:35,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:36,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:36,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:36,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:36,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:36,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:36,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:36,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:36,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-01 00:07:36,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 00:07:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 00:07:36,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:07:36,281 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-10-01 00:07:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:36,898 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-01 00:07:36,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:07:36,898 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-01 00:07:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:36,899 INFO L225 Difference]: With dead ends: 135 [2018-10-01 00:07:36,899 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:07:36,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:07:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:07:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-01 00:07:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 00:07:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-01 00:07:36,905 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-10-01 00:07:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:36,905 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-01 00:07:36,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 00:07:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-01 00:07:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:07:36,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:36,906 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-01 00:07:36,906 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:36,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:36,906 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-10-01 00:07:36,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:36,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:36,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:36,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:36,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:37,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:37,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:37,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:37,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-01 00:07:37,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:37,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:37,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:37,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-01 00:07:37,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 00:07:37,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 00:07:37,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:07:37,848 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-10-01 00:07:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:38,002 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-01 00:07:38,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:07:38,002 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-01 00:07:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:38,003 INFO L225 Difference]: With dead ends: 93 [2018-10-01 00:07:38,003 INFO L226 Difference]: Without dead ends: 90 [2018-10-01 00:07:38,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:07:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-01 00:07:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-01 00:07:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 00:07:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-01 00:07:38,010 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-10-01 00:07:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:38,010 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-01 00:07:38,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 00:07:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-01 00:07:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-01 00:07:38,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:38,010 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-10-01 00:07:38,011 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:38,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-10-01 00:07:38,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:38,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:38,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:38,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:38,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:39,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:39,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:39,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:39,361 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:39,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:39,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:39,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:39,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-01 00:07:39,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 00:07:39,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 00:07:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:07:39,405 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-10-01 00:07:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:41,768 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-01 00:07:41,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:07:41,768 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-10-01 00:07:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:41,769 INFO L225 Difference]: With dead ends: 137 [2018-10-01 00:07:41,770 INFO L226 Difference]: Without dead ends: 134 [2018-10-01 00:07:41,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:07:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-01 00:07:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-10-01 00:07:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-01 00:07:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-01 00:07:41,775 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-01 00:07:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:41,775 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-01 00:07:41,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 00:07:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-01 00:07:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:07:41,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:41,776 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-01 00:07:41,776 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:41,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-10-01 00:07:41,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:41,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:41,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:41,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:41,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:42,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:42,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:42,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:42,596 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-01 00:07:42,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:42,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:42,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:42,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-01 00:07:42,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 00:07:42,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 00:07:42,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-01 00:07:42,637 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-10-01 00:07:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:43,238 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-01 00:07:43,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:07:43,239 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-01 00:07:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:43,240 INFO L225 Difference]: With dead ends: 138 [2018-10-01 00:07:43,240 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 00:07:43,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-01 00:07:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 00:07:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-01 00:07:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:07:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-01 00:07:43,246 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-10-01 00:07:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:43,246 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-01 00:07:43,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 00:07:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-01 00:07:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:07:43,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:43,247 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-01 00:07:43,247 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:43,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-10-01 00:07:43,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:43,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:43,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:43,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:43,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:44,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:44,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:44,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:44,342 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-01 00:07:44,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:44,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:44,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:44,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-01 00:07:44,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 00:07:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 00:07:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-01 00:07:44,387 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-01 00:07:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:44,530 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-10-01 00:07:44,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:07:44,531 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-01 00:07:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:44,531 INFO L225 Difference]: With dead ends: 95 [2018-10-01 00:07:44,531 INFO L226 Difference]: Without dead ends: 92 [2018-10-01 00:07:44,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-01 00:07:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-01 00:07:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-01 00:07:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-01 00:07:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-01 00:07:44,538 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-10-01 00:07:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:44,538 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-01 00:07:44,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 00:07:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-01 00:07:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-01 00:07:44,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:44,538 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-10-01 00:07:44,539 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:44,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-10-01 00:07:44,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:44,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:44,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:44,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:44,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:45,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:45,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:45,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:45,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:45,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:45,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-01 00:07:45,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 00:07:45,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 00:07:45,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-01 00:07:45,811 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-10-01 00:07:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:48,290 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-01 00:07:48,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:07:48,290 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-10-01 00:07:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:48,291 INFO L225 Difference]: With dead ends: 140 [2018-10-01 00:07:48,291 INFO L226 Difference]: Without dead ends: 137 [2018-10-01 00:07:48,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-01 00:07:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-01 00:07:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-10-01 00:07:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-01 00:07:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-01 00:07:48,297 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-10-01 00:07:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:48,298 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-01 00:07:48,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 00:07:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-01 00:07:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 00:07:48,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:48,298 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-01 00:07:48,299 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:48,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-10-01 00:07:48,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:48,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:48,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:48,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:48,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:49,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:49,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:49,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:49,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:49,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:49,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:49,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:49,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-01 00:07:49,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:07:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:07:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:07:49,507 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-10-01 00:07:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:50,138 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-01 00:07:50,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:07:50,138 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-01 00:07:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:50,139 INFO L225 Difference]: With dead ends: 141 [2018-10-01 00:07:50,139 INFO L226 Difference]: Without dead ends: 93 [2018-10-01 00:07:50,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:07:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-01 00:07:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-01 00:07:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-01 00:07:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-01 00:07:50,147 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-10-01 00:07:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:50,147 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-01 00:07:50,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:07:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-01 00:07:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 00:07:50,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:50,148 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-01 00:07:50,148 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:50,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-10-01 00:07:50,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:50,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:50,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:50,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:50,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:51,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:51,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:51,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:51,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-01 00:07:51,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:51,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:51,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:51,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-01 00:07:51,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:07:51,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:07:51,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:07:51,123 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-10-01 00:07:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:51,260 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-01 00:07:51,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:07:51,260 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-01 00:07:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:51,261 INFO L225 Difference]: With dead ends: 97 [2018-10-01 00:07:51,261 INFO L226 Difference]: Without dead ends: 94 [2018-10-01 00:07:51,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:07:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-01 00:07:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-01 00:07:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-01 00:07:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-01 00:07:51,268 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-10-01 00:07:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:51,269 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-01 00:07:51,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:07:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-01 00:07:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-01 00:07:51,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:51,269 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-10-01 00:07:51,269 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:51,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-10-01 00:07:51,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:51,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:51,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:51,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:51,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:52,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:52,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:52,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:52,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:52,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:52,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:52,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:52,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-01 00:07:52,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:07:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:07:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:07:52,640 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-10-01 00:07:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:55,391 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-01 00:07:55,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:07:55,391 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-10-01 00:07:55,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:55,392 INFO L225 Difference]: With dead ends: 143 [2018-10-01 00:07:55,392 INFO L226 Difference]: Without dead ends: 140 [2018-10-01 00:07:55,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:07:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-01 00:07:55,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-10-01 00:07:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-01 00:07:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-01 00:07:55,399 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-10-01 00:07:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:55,399 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-01 00:07:55,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:07:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-01 00:07:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-01 00:07:55,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:55,400 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-01 00:07:55,400 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:55,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:55,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-10-01 00:07:55,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:55,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:55,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:55,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:55,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:56,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:56,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:56,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:56,288 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-01 00:07:56,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:56,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:56,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:56,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-01 00:07:56,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 00:07:56,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 00:07:56,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-01 00:07:56,331 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-10-01 00:07:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:56,746 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-10-01 00:07:56,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:07:56,747 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-01 00:07:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:56,747 INFO L225 Difference]: With dead ends: 144 [2018-10-01 00:07:56,747 INFO L226 Difference]: Without dead ends: 95 [2018-10-01 00:07:56,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-01 00:07:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-01 00:07:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-01 00:07:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-01 00:07:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-01 00:07:56,753 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-10-01 00:07:56,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:56,754 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-01 00:07:56,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 00:07:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-01 00:07:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-01 00:07:56,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:56,754 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-01 00:07:56,754 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:56,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-10-01 00:07:56,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:56,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:56,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:56,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:56,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:57,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:57,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:57,653 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:57,725 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-01 00:07:57,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:57,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:57,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:57,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-01 00:07:57,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 00:07:57,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 00:07:57,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-01 00:07:57,765 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-01 00:07:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:57,908 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-10-01 00:07:57,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:07:57,909 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-01 00:07:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:57,909 INFO L225 Difference]: With dead ends: 99 [2018-10-01 00:07:57,909 INFO L226 Difference]: Without dead ends: 96 [2018-10-01 00:07:57,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-01 00:07:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-01 00:07:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-01 00:07:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-01 00:07:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-01 00:07:57,916 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-10-01 00:07:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:57,916 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-01 00:07:57,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 00:07:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-01 00:07:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-01 00:07:57,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:57,917 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-10-01 00:07:57,917 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:57,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:57,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-10-01 00:07:57,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:57,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:57,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:57,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:57,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:59,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:59,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:59,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:59,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:59,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:59,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-01 00:07:59,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 00:07:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 00:07:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-01 00:07:59,306 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-10-01 00:08:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:02,033 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-01 00:08:02,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:08:02,033 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-10-01 00:08:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:02,034 INFO L225 Difference]: With dead ends: 146 [2018-10-01 00:08:02,034 INFO L226 Difference]: Without dead ends: 143 [2018-10-01 00:08:02,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-01 00:08:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-01 00:08:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-10-01 00:08:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-01 00:08:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-10-01 00:08:02,040 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-10-01 00:08:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:02,040 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-10-01 00:08:02,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 00:08:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-10-01 00:08:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 00:08:02,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:02,041 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-01 00:08:02,041 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:02,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:02,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-10-01 00:08:02,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:02,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:02,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:02,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:02,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:02,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:02,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:02,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:02,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:02,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:02,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:02,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:02,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-01 00:08:02,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 00:08:02,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 00:08:02,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:08:02,971 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-10-01 00:08:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:03,700 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-10-01 00:08:03,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:08:03,700 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-01 00:08:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:03,701 INFO L225 Difference]: With dead ends: 147 [2018-10-01 00:08:03,701 INFO L226 Difference]: Without dead ends: 97 [2018-10-01 00:08:03,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:08:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-01 00:08:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-01 00:08:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-01 00:08:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-01 00:08:03,708 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-10-01 00:08:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:03,708 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-01 00:08:03,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 00:08:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-01 00:08:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 00:08:03,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:03,708 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-01 00:08:03,709 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:03,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-10-01 00:08:03,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:03,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:03,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:03,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:03,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:04,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:04,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:04,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:04,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-01 00:08:04,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:04,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:04,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:04,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-01 00:08:04,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 00:08:04,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 00:08:04,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:08:04,996 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-10-01 00:08:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:05,162 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-01 00:08:05,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:08:05,162 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-01 00:08:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:05,163 INFO L225 Difference]: With dead ends: 101 [2018-10-01 00:08:05,163 INFO L226 Difference]: Without dead ends: 98 [2018-10-01 00:08:05,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:08:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-01 00:08:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-01 00:08:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-01 00:08:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-01 00:08:05,169 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-10-01 00:08:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:05,169 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-01 00:08:05,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 00:08:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-01 00:08:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-01 00:08:05,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:05,169 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-10-01 00:08:05,170 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:05,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:05,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-10-01 00:08:05,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:05,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:05,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:05,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:05,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:06,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:06,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:06,366 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:06,427 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:06,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:06,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:06,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:06,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-01 00:08:06,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 00:08:06,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 00:08:06,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:08:06,477 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-10-01 00:08:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:09,358 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-01 00:08:09,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:08:09,358 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-10-01 00:08:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:09,358 INFO L225 Difference]: With dead ends: 149 [2018-10-01 00:08:09,358 INFO L226 Difference]: Without dead ends: 146 [2018-10-01 00:08:09,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:08:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-01 00:08:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-10-01 00:08:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-01 00:08:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-01 00:08:09,364 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-10-01 00:08:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:09,364 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-01 00:08:09,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 00:08:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-01 00:08:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 00:08:09,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:09,365 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-01 00:08:09,365 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:09,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:09,365 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-10-01 00:08:09,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:09,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:09,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:09,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:09,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:10,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:10,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:10,365 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:10,441 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-01 00:08:10,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:10,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:10,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:10,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-01 00:08:10,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:08:10,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:08:10,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-01 00:08:10,498 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-10-01 00:08:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:11,238 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-01 00:08:11,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:08:11,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-01 00:08:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:11,239 INFO L225 Difference]: With dead ends: 150 [2018-10-01 00:08:11,239 INFO L226 Difference]: Without dead ends: 99 [2018-10-01 00:08:11,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-01 00:08:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-01 00:08:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-01 00:08:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-01 00:08:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-01 00:08:11,245 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-10-01 00:08:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:11,246 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-01 00:08:11,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 00:08:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-01 00:08:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 00:08:11,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:11,246 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-01 00:08:11,246 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:11,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:11,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-10-01 00:08:11,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:11,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:11,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:11,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:11,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:12,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:12,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:12,151 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:12,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-01 00:08:12,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:12,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:12,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:12,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-01 00:08:12,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:08:12,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:08:12,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-01 00:08:12,270 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-01 00:08:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:12,452 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-01 00:08:12,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:08:12,452 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-01 00:08:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:12,453 INFO L225 Difference]: With dead ends: 103 [2018-10-01 00:08:12,453 INFO L226 Difference]: Without dead ends: 100 [2018-10-01 00:08:12,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-01 00:08:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-01 00:08:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-01 00:08:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-01 00:08:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-01 00:08:12,460 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-10-01 00:08:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:12,460 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-01 00:08:12,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 00:08:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-01 00:08:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-01 00:08:12,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:12,461 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-10-01 00:08:12,461 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:12,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-10-01 00:08:12,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:12,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:12,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:12,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:12,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:13,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:13,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:13,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:13,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:13,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:13,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-01 00:08:13,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:08:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:08:13,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-01 00:08:13,785 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-10-01 00:08:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:16,860 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-01 00:08:16,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:08:16,861 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-10-01 00:08:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:16,861 INFO L225 Difference]: With dead ends: 152 [2018-10-01 00:08:16,861 INFO L226 Difference]: Without dead ends: 149 [2018-10-01 00:08:16,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-01 00:08:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-01 00:08:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-10-01 00:08:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-01 00:08:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-10-01 00:08:16,869 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-10-01 00:08:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:16,869 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-10-01 00:08:16,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 00:08:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-10-01 00:08:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 00:08:16,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:16,870 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-01 00:08:16,870 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:16,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-10-01 00:08:16,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:16,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:16,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:16,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:16,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:17,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:17,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:17,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:17,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:17,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:17,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:17,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:17,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-01 00:08:17,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 00:08:17,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 00:08:17,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:08:17,883 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-10-01 00:08:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:18,634 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-10-01 00:08:18,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:08:18,634 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-01 00:08:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:18,635 INFO L225 Difference]: With dead ends: 153 [2018-10-01 00:08:18,635 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 00:08:18,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:08:18,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 00:08:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-01 00:08:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-01 00:08:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-01 00:08:18,643 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-10-01 00:08:18,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:18,644 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-01 00:08:18,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 00:08:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-01 00:08:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 00:08:18,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:18,644 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-01 00:08:18,645 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:18,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-10-01 00:08:18,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:18,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:18,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:18,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:18,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:19,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:19,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:19,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:20,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-01 00:08:20,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:20,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:20,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:20,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-01 00:08:20,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 00:08:20,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 00:08:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:08:20,071 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-10-01 00:08:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:20,244 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-01 00:08:20,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:08:20,245 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-01 00:08:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:20,245 INFO L225 Difference]: With dead ends: 105 [2018-10-01 00:08:20,245 INFO L226 Difference]: Without dead ends: 102 [2018-10-01 00:08:20,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:08:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-01 00:08:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-01 00:08:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-01 00:08:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-01 00:08:20,252 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-10-01 00:08:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:20,252 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-01 00:08:20,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 00:08:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-01 00:08:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-01 00:08:20,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:20,252 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-10-01 00:08:20,253 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:20,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-10-01 00:08:20,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:20,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:20,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:20,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:20,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:21,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:21,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:21,673 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:21,733 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:21,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:21,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:21,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:21,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-01 00:08:21,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 00:08:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 00:08:21,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:08:21,786 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-10-01 00:08:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:24,966 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-10-01 00:08:24,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:08:24,966 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-10-01 00:08:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:24,967 INFO L225 Difference]: With dead ends: 155 [2018-10-01 00:08:24,967 INFO L226 Difference]: Without dead ends: 152 [2018-10-01 00:08:24,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:08:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-01 00:08:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-10-01 00:08:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-01 00:08:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-01 00:08:24,974 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-01 00:08:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:24,974 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-01 00:08:24,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 00:08:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-01 00:08:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-01 00:08:24,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:24,974 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-01 00:08:24,975 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:24,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:24,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-10-01 00:08:24,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:24,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:24,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:24,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:24,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:25,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:25,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:25,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:26,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-01 00:08:26,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:26,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:26,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:26,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-01 00:08:26,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 00:08:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 00:08:26,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-01 00:08:26,079 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-10-01 00:08:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:26,858 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-01 00:08:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 00:08:26,858 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-01 00:08:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:26,859 INFO L225 Difference]: With dead ends: 156 [2018-10-01 00:08:26,859 INFO L226 Difference]: Without dead ends: 103 [2018-10-01 00:08:26,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-01 00:08:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-01 00:08:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-01 00:08:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-01 00:08:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-01 00:08:26,865 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-10-01 00:08:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:26,866 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-01 00:08:26,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 00:08:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-01 00:08:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-01 00:08:26,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:26,866 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-01 00:08:26,866 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:26,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:26,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-10-01 00:08:26,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:26,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:26,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:26,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:26,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:27,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:27,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:27,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:27,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-01 00:08:27,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:27,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:27,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:27,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-01 00:08:27,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 00:08:27,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 00:08:27,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-01 00:08:27,962 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-01 00:08:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:28,118 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-10-01 00:08:28,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 00:08:28,119 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-01 00:08:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:28,119 INFO L225 Difference]: With dead ends: 107 [2018-10-01 00:08:28,120 INFO L226 Difference]: Without dead ends: 104 [2018-10-01 00:08:28,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-01 00:08:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-01 00:08:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-01 00:08:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-01 00:08:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-01 00:08:28,127 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-10-01 00:08:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:28,127 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-01 00:08:28,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 00:08:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-01 00:08:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-01 00:08:28,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:28,127 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-10-01 00:08:28,128 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:28,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-10-01 00:08:28,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:28,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:28,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:28,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:28,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:29,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:29,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:29,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:29,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:29,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:29,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-01 00:08:29,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 00:08:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 00:08:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-01 00:08:29,588 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-10-01 00:08:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:32,968 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-01 00:08:32,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 00:08:32,969 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-10-01 00:08:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:32,970 INFO L225 Difference]: With dead ends: 158 [2018-10-01 00:08:32,970 INFO L226 Difference]: Without dead ends: 155 [2018-10-01 00:08:32,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-01 00:08:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-01 00:08:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-10-01 00:08:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-01 00:08:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-01 00:08:32,979 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-10-01 00:08:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:32,980 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-01 00:08:32,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 00:08:32,980 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-01 00:08:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 00:08:32,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:32,980 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-01 00:08:32,981 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:32,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-10-01 00:08:32,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:32,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:32,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:32,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:32,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:33,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:33,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:33,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:34,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:34,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:34,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:34,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:34,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-01 00:08:34,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 00:08:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 00:08:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:08:34,082 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-10-01 00:08:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:34,586 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-10-01 00:08:34,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:08:34,586 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-01 00:08:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:34,587 INFO L225 Difference]: With dead ends: 159 [2018-10-01 00:08:34,587 INFO L226 Difference]: Without dead ends: 105 [2018-10-01 00:08:34,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:08:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-01 00:08:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-01 00:08:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-01 00:08:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-01 00:08:34,594 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-10-01 00:08:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:34,594 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-01 00:08:34,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 00:08:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-01 00:08:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 00:08:34,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:34,595 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-01 00:08:34,595 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:34,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-10-01 00:08:34,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:34,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:34,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:34,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:34,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:36,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:36,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:36,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:36,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-01 00:08:36,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:36,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:36,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:36,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-01 00:08:36,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 00:08:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 00:08:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:08:36,134 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-10-01 00:08:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:36,289 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-01 00:08:36,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:08:36,290 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-01 00:08:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:36,291 INFO L225 Difference]: With dead ends: 109 [2018-10-01 00:08:36,291 INFO L226 Difference]: Without dead ends: 106 [2018-10-01 00:08:36,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:08:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-01 00:08:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-01 00:08:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-01 00:08:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-01 00:08:36,298 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-10-01 00:08:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:36,298 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-01 00:08:36,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 00:08:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-01 00:08:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-01 00:08:36,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:36,299 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-10-01 00:08:36,299 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:36,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:36,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-10-01 00:08:36,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:36,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:36,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:36,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:36,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:37,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:37,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:37,714 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:37,780 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:37,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:37,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:37,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:37,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-01 00:08:37,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 00:08:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 00:08:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:08:37,832 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-10-01 00:08:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:41,370 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-01 00:08:41,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:08:41,371 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-10-01 00:08:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:41,372 INFO L225 Difference]: With dead ends: 161 [2018-10-01 00:08:41,372 INFO L226 Difference]: Without dead ends: 158 [2018-10-01 00:08:41,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:08:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-01 00:08:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-10-01 00:08:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-01 00:08:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-01 00:08:41,380 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-10-01 00:08:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:41,380 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-01 00:08:41,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 00:08:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-01 00:08:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 00:08:41,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:41,380 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-01 00:08:41,380 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:41,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-10-01 00:08:41,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:41,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:41,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:41,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:41,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:42,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:42,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:42,409 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:42,498 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-01 00:08:42,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:42,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:42,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:42,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-01 00:08:42,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:08:42,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:08:42,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-01 00:08:42,542 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-10-01 00:08:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:43,447 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-10-01 00:08:43,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:08:43,448 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-01 00:08:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:43,448 INFO L225 Difference]: With dead ends: 162 [2018-10-01 00:08:43,448 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 00:08:43,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-01 00:08:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 00:08:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-01 00:08:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-01 00:08:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-01 00:08:43,457 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-10-01 00:08:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:43,458 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-01 00:08:43,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 00:08:43,458 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-01 00:08:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 00:08:43,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:43,458 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-01 00:08:43,459 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:43,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-10-01 00:08:43,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:43,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:43,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:43,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:43,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:44,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:44,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:44,574 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:44,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-01 00:08:44,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:44,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:44,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:44,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-01 00:08:44,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:08:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:08:44,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-01 00:08:44,708 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-01 00:08:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:44,869 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-10-01 00:08:44,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:08:44,869 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-01 00:08:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:44,870 INFO L225 Difference]: With dead ends: 111 [2018-10-01 00:08:44,870 INFO L226 Difference]: Without dead ends: 108 [2018-10-01 00:08:44,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-01 00:08:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-01 00:08:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-01 00:08:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-01 00:08:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-01 00:08:44,880 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-10-01 00:08:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:44,880 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-01 00:08:44,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 00:08:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-01 00:08:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-01 00:08:44,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:44,881 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-10-01 00:08:44,881 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:44,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-10-01 00:08:44,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:44,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:44,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:44,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:44,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:46,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:46,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:46,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:46,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:46,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:46,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-01 00:08:46,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:08:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:08:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-01 00:08:46,728 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-10-01 00:08:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:50,196 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-01 00:08:50,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:08:50,196 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-10-01 00:08:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:50,196 INFO L225 Difference]: With dead ends: 164 [2018-10-01 00:08:50,196 INFO L226 Difference]: Without dead ends: 161 [2018-10-01 00:08:50,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-01 00:08:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-01 00:08:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-01 00:08:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-01 00:08:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-01 00:08:50,203 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-01 00:08:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:50,203 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-01 00:08:50,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 00:08:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-01 00:08:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 00:08:50,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:50,203 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-01 00:08:50,203 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:50,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-10-01 00:08:50,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:50,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:50,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:50,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:50,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:51,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:51,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:51,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:51,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:51,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:51,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:51,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:51,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-01 00:08:51,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 00:08:51,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 00:08:51,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:08:51,576 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-10-01 00:08:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:52,239 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-10-01 00:08:52,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:08:52,239 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-01 00:08:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:52,240 INFO L225 Difference]: With dead ends: 165 [2018-10-01 00:08:52,240 INFO L226 Difference]: Without dead ends: 109 [2018-10-01 00:08:52,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:08:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-01 00:08:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-01 00:08:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-01 00:08:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-01 00:08:52,248 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-10-01 00:08:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:52,248 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-01 00:08:52,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 00:08:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-01 00:08:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 00:08:52,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:52,248 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-01 00:08:52,248 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:52,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-10-01 00:08:52,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:52,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:52,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:52,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:52,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:53,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:53,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:53,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:53,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-01 00:08:53,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:53,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:53,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:53,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-01 00:08:53,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 00:08:53,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 00:08:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:08:53,473 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-10-01 00:08:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:53,678 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-01 00:08:53,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:08:53,679 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-01 00:08:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:53,679 INFO L225 Difference]: With dead ends: 113 [2018-10-01 00:08:53,680 INFO L226 Difference]: Without dead ends: 110 [2018-10-01 00:08:53,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:08:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-01 00:08:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-01 00:08:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-01 00:08:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-01 00:08:53,688 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-10-01 00:08:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:53,688 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-01 00:08:53,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 00:08:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-01 00:08:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-01 00:08:53,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:53,688 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-10-01 00:08:53,688 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:53,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-10-01 00:08:53,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:53,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:53,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:53,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:53,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:55,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:55,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:55,166 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:55,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:55,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:55,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:55,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:55,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-01 00:08:55,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 00:08:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 00:08:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:08:55,290 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-10-01 00:08:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:59,029 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-10-01 00:08:59,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:08:59,030 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-10-01 00:08:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:59,030 INFO L225 Difference]: With dead ends: 167 [2018-10-01 00:08:59,031 INFO L226 Difference]: Without dead ends: 164 [2018-10-01 00:08:59,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:08:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-01 00:08:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-10-01 00:08:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-01 00:08:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-01 00:08:59,038 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-10-01 00:08:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:59,038 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-01 00:08:59,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 00:08:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-01 00:08:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-01 00:08:59,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:59,039 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-01 00:08:59,039 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:59,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:59,039 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-10-01 00:08:59,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:59,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:59,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:59,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:59,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:00,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:00,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:00,113 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:00,200 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-01 00:09:00,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:00,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:00,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:00,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-01 00:09:00,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 00:09:00,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 00:09:00,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-01 00:09:00,248 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-10-01 00:09:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:01,331 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-01 00:09:01,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 00:09:01,332 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-01 00:09:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:01,333 INFO L225 Difference]: With dead ends: 168 [2018-10-01 00:09:01,333 INFO L226 Difference]: Without dead ends: 111 [2018-10-01 00:09:01,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-01 00:09:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-01 00:09:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-01 00:09:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-01 00:09:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-01 00:09:01,340 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-10-01 00:09:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:01,340 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-01 00:09:01,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 00:09:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-01 00:09:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-01 00:09:01,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:01,341 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-01 00:09:01,341 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:01,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-10-01 00:09:01,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:01,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:01,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:01,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:01,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:03,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:03,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:03,177 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:03,259 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-01 00:09:03,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:03,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:03,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:03,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-01 00:09:03,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 00:09:03,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 00:09:03,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-01 00:09:03,304 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-01 00:09:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:03,520 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-01 00:09:03,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 00:09:03,520 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-01 00:09:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:03,521 INFO L225 Difference]: With dead ends: 115 [2018-10-01 00:09:03,521 INFO L226 Difference]: Without dead ends: 112 [2018-10-01 00:09:03,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-01 00:09:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-01 00:09:03,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-01 00:09:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-01 00:09:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-01 00:09:03,528 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-10-01 00:09:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:03,529 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-01 00:09:03,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 00:09:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-01 00:09:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-01 00:09:03,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:03,529 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-10-01 00:09:03,529 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:03,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-10-01 00:09:03,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:03,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:03,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:03,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:03,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:05,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:05,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:05,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:05,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:05,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:05,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-01 00:09:05,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 00:09:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 00:09:05,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-01 00:09:05,187 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-10-01 00:09:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:09,109 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-01 00:09:09,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 00:09:09,109 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-10-01 00:09:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:09,110 INFO L225 Difference]: With dead ends: 170 [2018-10-01 00:09:09,110 INFO L226 Difference]: Without dead ends: 167 [2018-10-01 00:09:09,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-01 00:09:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-01 00:09:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-10-01 00:09:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-01 00:09:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-10-01 00:09:09,119 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-10-01 00:09:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:09,119 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-10-01 00:09:09,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 00:09:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-10-01 00:09:09,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 00:09:09,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:09,120 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-01 00:09:09,120 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:09,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-10-01 00:09:09,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:09,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:09,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:09,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:09,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:10,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:10,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:10,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:10,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:10,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:10,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:10,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:10,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-01 00:09:10,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 00:09:10,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 00:09:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:09:10,355 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-10-01 00:09:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:11,036 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-01 00:09:11,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:09:11,036 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-01 00:09:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:11,037 INFO L225 Difference]: With dead ends: 171 [2018-10-01 00:09:11,037 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 00:09:11,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:09:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 00:09:11,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-01 00:09:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-01 00:09:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-01 00:09:11,053 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-10-01 00:09:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:11,053 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-01 00:09:11,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 00:09:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-01 00:09:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 00:09:11,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:11,054 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-01 00:09:11,054 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:11,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:11,054 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-10-01 00:09:11,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:11,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:11,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:11,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:11,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:12,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:12,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:12,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:12,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-01 00:09:12,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:12,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:12,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:12,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-01 00:09:12,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 00:09:12,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 00:09:12,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:09:12,417 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-10-01 00:09:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:12,596 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-01 00:09:12,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:09:12,597 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-01 00:09:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:12,597 INFO L225 Difference]: With dead ends: 117 [2018-10-01 00:09:12,597 INFO L226 Difference]: Without dead ends: 114 [2018-10-01 00:09:12,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:09:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-01 00:09:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-01 00:09:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-01 00:09:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-01 00:09:12,608 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-10-01 00:09:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:12,609 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-01 00:09:12,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 00:09:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-01 00:09:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-01 00:09:12,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:12,609 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-10-01 00:09:12,610 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:12,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-10-01 00:09:12,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:12,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:12,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:12,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:12,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:14,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:14,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:14,184 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:14,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:14,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:14,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:14,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:14,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-01 00:09:14,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 00:09:14,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 00:09:14,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:09:14,312 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-10-01 00:09:18,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:18,360 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-01 00:09:18,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:09:18,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-10-01 00:09:18,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:18,361 INFO L225 Difference]: With dead ends: 173 [2018-10-01 00:09:18,361 INFO L226 Difference]: Without dead ends: 170 [2018-10-01 00:09:18,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:09:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-01 00:09:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-10-01 00:09:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-01 00:09:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-01 00:09:18,369 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-10-01 00:09:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:18,369 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-01 00:09:18,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 00:09:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-01 00:09:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 00:09:18,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:18,369 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-01 00:09:18,370 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:18,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:18,370 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-10-01 00:09:18,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:18,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:18,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:18,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:18,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:19,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:19,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:19,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:19,621 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-10-01 00:09:19,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:19,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:19,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:19,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-01 00:09:19,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 00:09:19,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 00:09:19,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-01 00:09:19,668 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-10-01 00:09:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:20,071 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-10-01 00:09:20,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:09:20,071 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-01 00:09:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:20,072 INFO L225 Difference]: With dead ends: 174 [2018-10-01 00:09:20,072 INFO L226 Difference]: Without dead ends: 115 [2018-10-01 00:09:20,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-01 00:09:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-01 00:09:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-01 00:09:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-01 00:09:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-01 00:09:20,083 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-10-01 00:09:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:20,083 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-01 00:09:20,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 00:09:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-01 00:09:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 00:09:20,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:20,084 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-01 00:09:20,084 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:20,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:20,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-10-01 00:09:20,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:20,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:20,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:20,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:20,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:21,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:21,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:21,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:21,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-01 00:09:21,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:21,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:21,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:21,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-01 00:09:21,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 00:09:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 00:09:21,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-01 00:09:21,787 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-01 00:09:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:21,978 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-10-01 00:09:21,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:09:21,979 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-01 00:09:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:21,980 INFO L225 Difference]: With dead ends: 119 [2018-10-01 00:09:21,980 INFO L226 Difference]: Without dead ends: 116 [2018-10-01 00:09:21,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-01 00:09:21,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-01 00:09:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-01 00:09:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-01 00:09:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-10-01 00:09:21,987 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-10-01 00:09:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:21,987 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-10-01 00:09:21,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 00:09:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-10-01 00:09:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-01 00:09:21,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:21,988 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-10-01 00:09:21,988 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:21,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:21,988 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-10-01 00:09:21,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:21,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:21,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:21,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:21,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:23,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:23,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:23,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:23,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:23,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:23,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-01 00:09:23,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 00:09:23,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 00:09:23,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-01 00:09:23,731 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-10-01 00:09:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:27,972 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-01 00:09:27,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:09:27,972 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-10-01 00:09:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:27,973 INFO L225 Difference]: With dead ends: 176 [2018-10-01 00:09:27,973 INFO L226 Difference]: Without dead ends: 173 [2018-10-01 00:09:27,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-01 00:09:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-01 00:09:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-10-01 00:09:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-01 00:09:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-01 00:09:27,981 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-10-01 00:09:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:27,982 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-01 00:09:27,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 00:09:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-01 00:09:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 00:09:27,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:27,982 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-01 00:09:27,982 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:27,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:27,982 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-10-01 00:09:27,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:27,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:27,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:27,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:27,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:29,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:29,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:29,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:29,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:29,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:29,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:29,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:29,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-01 00:09:29,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 00:09:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 00:09:29,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:09:29,334 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-10-01 00:09:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:30,017 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-10-01 00:09:30,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:09:30,018 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-01 00:09:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:30,018 INFO L225 Difference]: With dead ends: 177 [2018-10-01 00:09:30,018 INFO L226 Difference]: Without dead ends: 117 [2018-10-01 00:09:30,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:09:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-01 00:09:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-01 00:09:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-01 00:09:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-01 00:09:30,028 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-10-01 00:09:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:30,028 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-01 00:09:30,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 00:09:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-01 00:09:30,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 00:09:30,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:30,029 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-01 00:09:30,029 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:30,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-10-01 00:09:30,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:30,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:30,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:30,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:30,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:31,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:31,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:31,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:31,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-01 00:09:31,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:31,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:31,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:31,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-01 00:09:31,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 00:09:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 00:09:31,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:09:31,692 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-10-01 00:09:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:31,892 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-01 00:09:31,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:09:31,893 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-01 00:09:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:31,893 INFO L225 Difference]: With dead ends: 121 [2018-10-01 00:09:31,893 INFO L226 Difference]: Without dead ends: 118 [2018-10-01 00:09:31,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:09:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-01 00:09:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-01 00:09:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-01 00:09:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-01 00:09:31,901 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-10-01 00:09:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:31,902 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-01 00:09:31,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 00:09:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-01 00:09:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-01 00:09:31,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:31,902 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-10-01 00:09:31,902 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:31,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-10-01 00:09:31,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:31,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:31,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:31,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:31,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:33,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:33,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:33,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:33,670 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:33,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:33,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:33,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:33,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-01 00:09:33,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 00:09:33,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 00:09:33,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:09:33,723 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-10-01 00:09:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:38,024 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-10-01 00:09:38,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:09:38,024 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-10-01 00:09:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:38,025 INFO L225 Difference]: With dead ends: 179 [2018-10-01 00:09:38,025 INFO L226 Difference]: Without dead ends: 176 [2018-10-01 00:09:38,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:09:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-01 00:09:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-10-01 00:09:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-01 00:09:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-01 00:09:38,033 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-10-01 00:09:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:38,033 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-01 00:09:38,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 00:09:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-01 00:09:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 00:09:38,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:38,033 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-10-01 00:09:38,034 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:38,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:38,034 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-10-01 00:09:38,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:38,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:38,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:38,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:38,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:39,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:39,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:39,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:39,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-01 00:09:39,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:39,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:39,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:39,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-01 00:09:39,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 00:09:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 00:09:39,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-01 00:09:39,427 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 60 states. [2018-10-01 00:09:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:40,021 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-10-01 00:09:40,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 00:09:40,022 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-01 00:09:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:40,022 INFO L225 Difference]: With dead ends: 180 [2018-10-01 00:09:40,022 INFO L226 Difference]: Without dead ends: 119 [2018-10-01 00:09:40,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-01 00:09:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-01 00:09:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-01 00:09:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-01 00:09:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-01 00:09:40,030 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 118 [2018-10-01 00:09:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:40,031 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-01 00:09:40,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 00:09:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-01 00:09:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 00:09:40,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:40,031 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-10-01 00:09:40,031 INFO L423 AbstractCegarLoop]: === Iteration 171 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:40,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:40,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1725607533, now seen corresponding path program 168 times [2018-10-01 00:09:40,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:40,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:40,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:40,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:40,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:41,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:41,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:41,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:41,445 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-01 00:09:41,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:41,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:41,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:41,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-01 00:09:41,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 00:09:41,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 00:09:41,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-01 00:09:41,505 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-10-01 00:09:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:41,788 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-10-01 00:09:41,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 00:09:41,788 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-01 00:09:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:41,788 INFO L225 Difference]: With dead ends: 123 [2018-10-01 00:09:41,788 INFO L226 Difference]: Without dead ends: 120 [2018-10-01 00:09:41,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-01 00:09:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-01 00:09:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-01 00:09:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-01 00:09:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-01 00:09:41,796 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 118 [2018-10-01 00:09:41,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:41,796 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-01 00:09:41,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 00:09:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-01 00:09:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-01 00:09:41,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:41,797 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1] [2018-10-01 00:09:41,797 INFO L423 AbstractCegarLoop]: === Iteration 172 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:41,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1954164449, now seen corresponding path program 169 times [2018-10-01 00:09:41,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:41,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:41,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:41,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:41,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:43,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:43,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:43,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:43,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:43,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:43,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-01 00:09:43,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 00:09:43,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 00:09:43,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-01 00:09:43,705 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 60 states. [2018-10-01 00:09:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:48,147 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-01 00:09:48,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 00:09:48,147 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 119 [2018-10-01 00:09:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:48,148 INFO L225 Difference]: With dead ends: 182 [2018-10-01 00:09:48,148 INFO L226 Difference]: Without dead ends: 179 [2018-10-01 00:09:48,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-01 00:09:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-01 00:09:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 122. [2018-10-01 00:09:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-01 00:09:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-01 00:09:48,157 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-10-01 00:09:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:48,157 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-01 00:09:48,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 00:09:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-01 00:09:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 00:09:48,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:48,158 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1] [2018-10-01 00:09:48,158 INFO L423 AbstractCegarLoop]: === Iteration 173 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:48,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash 449494253, now seen corresponding path program 170 times [2018-10-01 00:09:48,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:48,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:48,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:48,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:48,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:49,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:49,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:49,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:49,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:49,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:49,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:49,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:49,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-01 00:09:49,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 00:09:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 00:09:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:09:49,574 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 61 states. [2018-10-01 00:09:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:50,108 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2018-10-01 00:09:50,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:09:50,108 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-01 00:09:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:50,109 INFO L225 Difference]: With dead ends: 183 [2018-10-01 00:09:50,109 INFO L226 Difference]: Without dead ends: 121 [2018-10-01 00:09:50,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:09:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-01 00:09:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-01 00:09:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-01 00:09:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-01 00:09:50,118 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 120 [2018-10-01 00:09:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:50,119 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-01 00:09:50,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 00:09:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-01 00:09:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 00:09:50,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:50,119 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1] [2018-10-01 00:09:50,119 INFO L423 AbstractCegarLoop]: === Iteration 174 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:50,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:50,120 INFO L82 PathProgramCache]: Analyzing trace with hash 180161031, now seen corresponding path program 171 times [2018-10-01 00:09:50,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:50,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:50,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:50,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:50,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:51,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:51,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:51,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:51,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-01 00:09:51,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:51,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:51,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:51,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-01 00:09:51,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 00:09:51,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 00:09:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:09:51,776 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 61 states. [2018-10-01 00:09:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:52,029 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-01 00:09:52,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:09:52,029 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-01 00:09:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:52,030 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:09:52,030 INFO L226 Difference]: Without dead ends: 122 [2018-10-01 00:09:52,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:09:52,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-01 00:09:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-01 00:09:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-01 00:09:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-10-01 00:09:52,037 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2018-10-01 00:09:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:52,038 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-10-01 00:09:52,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 00:09:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-10-01 00:09:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-01 00:09:52,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:52,038 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1] [2018-10-01 00:09:52,038 INFO L423 AbstractCegarLoop]: === Iteration 175 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:52,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1289963143, now seen corresponding path program 172 times [2018-10-01 00:09:52,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:52,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:52,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:52,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:52,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:53,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:53,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:53,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:54,064 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:54,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:54,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:54,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:54,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-01 00:09:54,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 00:09:54,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 00:09:54,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:09:54,119 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 61 states. [2018-10-01 00:09:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:58,734 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-10-01 00:09:58,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:09:58,734 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 121 [2018-10-01 00:09:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:58,735 INFO L225 Difference]: With dead ends: 185 [2018-10-01 00:09:58,735 INFO L226 Difference]: Without dead ends: 182 [2018-10-01 00:09:58,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:09:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-01 00:09:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 124. [2018-10-01 00:09:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-01 00:09:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-10-01 00:09:58,744 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 121 [2018-10-01 00:09:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:58,744 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-10-01 00:09:58,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 00:09:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-10-01 00:09:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 00:09:58,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:58,745 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1] [2018-10-01 00:09:58,745 INFO L423 AbstractCegarLoop]: === Iteration 176 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:58,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1334090247, now seen corresponding path program 173 times [2018-10-01 00:09:58,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:58,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:58,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:58,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:58,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:00,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:00,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-01 00:10:00,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:00,206 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-01 00:10:00,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:00,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:00,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:00,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-01 00:10:00,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 00:10:00,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 00:10:00,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-01 00:10:00,256 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 62 states. [2018-10-01 00:10:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:00,923 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2018-10-01 00:10:00,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 00:10:00,931 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-01 00:10:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:00,931 INFO L225 Difference]: With dead ends: 186 [2018-10-01 00:10:00,931 INFO L226 Difference]: Without dead ends: 123 [2018-10-01 00:10:00,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-01 00:10:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-01 00:10:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-01 00:10:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-01 00:10:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-01 00:10:00,942 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 122 [2018-10-01 00:10:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:00,943 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-01 00:10:00,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 00:10:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-01 00:10:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 00:10:00,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:00,943 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1] [2018-10-01 00:10:00,944 INFO L423 AbstractCegarLoop]: === Iteration 177 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:00,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:00,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1574694957, now seen corresponding path program 174 times [2018-10-01 00:10:00,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:00,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:00,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:00,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:00,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:02,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:02,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:02,984 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:03,079 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-01 00:10:03,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:03,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:03,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:03,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-01 00:10:03,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 00:10:03,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 00:10:03,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-01 00:10:03,127 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-10-01 00:10:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:03,357 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-10-01 00:10:03,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 00:10:03,357 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-01 00:10:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:03,358 INFO L225 Difference]: With dead ends: 127 [2018-10-01 00:10:03,358 INFO L226 Difference]: Without dead ends: 124 [2018-10-01 00:10:03,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-01 00:10:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-01 00:10:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-01 00:10:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-01 00:10:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-10-01 00:10:03,367 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 122 [2018-10-01 00:10:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:03,368 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-10-01 00:10:03,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 00:10:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-10-01 00:10:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-01 00:10:03,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:03,369 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1] [2018-10-01 00:10:03,369 INFO L423 AbstractCegarLoop]: === Iteration 178 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:03,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1570841889, now seen corresponding path program 175 times [2018-10-01 00:10:03,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:03,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:03,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:03,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:03,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:05,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:05,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:05,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:05,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:05,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:05,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-01 00:10:05,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 00:10:05,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 00:10:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-01 00:10:05,331 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 62 states. [2018-10-01 00:10:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:10,068 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-01 00:10:10,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 00:10:10,069 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 123 [2018-10-01 00:10:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:10,069 INFO L225 Difference]: With dead ends: 188 [2018-10-01 00:10:10,069 INFO L226 Difference]: Without dead ends: 185 [2018-10-01 00:10:10,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-01 00:10:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-01 00:10:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 126. [2018-10-01 00:10:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-01 00:10:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-10-01 00:10:10,078 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 123 [2018-10-01 00:10:10,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:10,078 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-10-01 00:10:10,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 00:10:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-10-01 00:10:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 00:10:10,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:10,079 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1] [2018-10-01 00:10:10,079 INFO L423 AbstractCegarLoop]: === Iteration 179 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:10,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1451396781, now seen corresponding path program 176 times [2018-10-01 00:10:10,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:10,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:10,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:10,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:10,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1830 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:11,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:11,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:11,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:11,516 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:11,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:11,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1830 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:11,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:11,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-01 00:10:11,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-01 00:10:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-01 00:10:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:10:11,564 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 63 states. [2018-10-01 00:10:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:12,031 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2018-10-01 00:10:12,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:10:12,031 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-01 00:10:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:12,032 INFO L225 Difference]: With dead ends: 189 [2018-10-01 00:10:12,032 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 00:10:12,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:10:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 00:10:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-01 00:10:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-01 00:10:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-01 00:10:12,041 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 124 [2018-10-01 00:10:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:12,041 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-01 00:10:12,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-01 00:10:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-01 00:10:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 00:10:12,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:12,042 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1] [2018-10-01 00:10:12,042 INFO L423 AbstractCegarLoop]: === Iteration 180 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:12,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:12,042 INFO L82 PathProgramCache]: Analyzing trace with hash 320208199, now seen corresponding path program 177 times [2018-10-01 00:10:12,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:12,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:12,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:12,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:12,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1830 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:13,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:13,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:13,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:13,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-10-01 00:10:13,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:13,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1830 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:14,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:14,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-01 00:10:14,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-01 00:10:14,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-01 00:10:14,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:10:14,006 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 63 states. [2018-10-01 00:10:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:14,286 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-01 00:10:14,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:10:14,287 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-01 00:10:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:14,287 INFO L225 Difference]: With dead ends: 129 [2018-10-01 00:10:14,287 INFO L226 Difference]: Without dead ends: 126 [2018-10-01 00:10:14,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:10:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-01 00:10:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-01 00:10:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-01 00:10:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-01 00:10:14,296 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2018-10-01 00:10:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:14,297 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-01 00:10:14,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-01 00:10:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-01 00:10:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-01 00:10:14,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:14,297 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1] [2018-10-01 00:10:14,297 INFO L423 AbstractCegarLoop]: === Iteration 181 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:14,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:14,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1336458055, now seen corresponding path program 178 times [2018-10-01 00:10:14,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:14,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:14,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:14,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:14,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:16,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:16,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:16,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:10:16,281 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:10:16,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:16,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:16,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:16,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-01 00:10:16,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-01 00:10:16,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-01 00:10:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:10:16,336 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 63 states. [2018-10-01 00:10:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:21,211 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-10-01 00:10:21,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:10:21,211 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 125 [2018-10-01 00:10:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:21,212 INFO L225 Difference]: With dead ends: 191 [2018-10-01 00:10:21,212 INFO L226 Difference]: Without dead ends: 188 [2018-10-01 00:10:21,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:10:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-01 00:10:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 128. [2018-10-01 00:10:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-01 00:10:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-10-01 00:10:21,222 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-10-01 00:10:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:21,222 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-10-01 00:10:21,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-01 00:10:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-10-01 00:10:21,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-01 00:10:21,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:21,223 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1] [2018-10-01 00:10:21,223 INFO L423 AbstractCegarLoop]: === Iteration 182 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:21,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:21,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1519534777, now seen corresponding path program 179 times [2018-10-01 00:10:21,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:21,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:21,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:21,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:21,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1891 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:22,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:22,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:22,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:10:23,033 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-01 00:10:23,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:23,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1891 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:23,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:23,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-01 00:10:23,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-01 00:10:23,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-01 00:10:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-01 00:10:23,083 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 64 states. [2018-10-01 00:10:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:23,533 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-10-01 00:10:23,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-01 00:10:23,533 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-01 00:10:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:23,534 INFO L225 Difference]: With dead ends: 192 [2018-10-01 00:10:23,534 INFO L226 Difference]: Without dead ends: 127 [2018-10-01 00:10:23,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-01 00:10:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-01 00:10:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-01 00:10:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-01 00:10:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-01 00:10:23,544 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 126 [2018-10-01 00:10:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:23,544 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-01 00:10:23,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-01 00:10:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-01 00:10:23,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-01 00:10:23,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:23,544 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1] [2018-10-01 00:10:23,545 INFO L423 AbstractCegarLoop]: === Iteration 183 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:23,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2068324845, now seen corresponding path program 180 times [2018-10-01 00:10:23,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:23,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:23,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:23,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:23,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1891 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:25,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:25,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:25,120 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:25,221 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-01 00:10:25,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:25,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1891 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:25,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:25,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-01 00:10:25,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-01 00:10:25,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-01 00:10:25,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-01 00:10:25,270 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-10-01 00:10:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:25,542 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2018-10-01 00:10:25,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-01 00:10:25,543 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-01 00:10:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:25,543 INFO L225 Difference]: With dead ends: 131 [2018-10-01 00:10:25,544 INFO L226 Difference]: Without dead ends: 128 [2018-10-01 00:10:25,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-01 00:10:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-01 00:10:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-01 00:10:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-01 00:10:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-10-01 00:10:25,553 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 126 [2018-10-01 00:10:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:25,553 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-10-01 00:10:25,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-01 00:10:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-10-01 00:10:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-01 00:10:25,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:25,554 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1] [2018-10-01 00:10:25,554 INFO L423 AbstractCegarLoop]: === Iteration 184 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:25,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash -306500767, now seen corresponding path program 181 times [2018-10-01 00:10:25,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:25,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:25,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:25,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:25,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:27,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:27,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:27,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:27,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:27,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:27,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-01 00:10:27,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-01 00:10:27,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-01 00:10:27,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-01 00:10:27,650 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 64 states. [2018-10-01 00:10:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:32,653 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-01 00:10:32,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-01 00:10:32,654 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 127 [2018-10-01 00:10:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:32,654 INFO L225 Difference]: With dead ends: 194 [2018-10-01 00:10:32,654 INFO L226 Difference]: Without dead ends: 191 [2018-10-01 00:10:32,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-01 00:10:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-01 00:10:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 130. [2018-10-01 00:10:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-01 00:10:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-01 00:10:32,662 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 127 [2018-10-01 00:10:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:32,662 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-01 00:10:32,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-01 00:10:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-01 00:10:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-01 00:10:32,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:32,663 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1] [2018-10-01 00:10:32,663 INFO L423 AbstractCegarLoop]: === Iteration 185 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:32,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:32,663 INFO L82 PathProgramCache]: Analyzing trace with hash -911650707, now seen corresponding path program 182 times [2018-10-01 00:10:32,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:32,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:32,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:32,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:32,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1953 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:34,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:34,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:34,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:34,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:34,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:34,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1953 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:34,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:34,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-01 00:10:34,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 00:10:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 00:10:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:10:34,386 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 65 states. [2018-10-01 00:10:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:35,113 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2018-10-01 00:10:35,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:10:35,113 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-01 00:10:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:35,114 INFO L225 Difference]: With dead ends: 195 [2018-10-01 00:10:35,114 INFO L226 Difference]: Without dead ends: 129 [2018-10-01 00:10:35,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:10:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-01 00:10:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-01 00:10:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-01 00:10:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-01 00:10:35,124 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 128 [2018-10-01 00:10:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:35,124 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-01 00:10:35,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 00:10:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-01 00:10:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-01 00:10:35,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:35,124 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1] [2018-10-01 00:10:35,125 INFO L423 AbstractCegarLoop]: === Iteration 186 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:35,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1357152121, now seen corresponding path program 183 times [2018-10-01 00:10:35,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:35,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:35,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:35,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:35,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1953 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:36,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:36,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:36,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:36,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-10-01 00:10:36,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:36,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1953 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:36,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:36,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-01 00:10:36,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 00:10:36,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 00:10:36,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:10:36,830 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 65 states. [2018-10-01 00:10:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:37,055 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-01 00:10:37,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:10:37,056 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-01 00:10:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:37,056 INFO L225 Difference]: With dead ends: 133 [2018-10-01 00:10:37,057 INFO L226 Difference]: Without dead ends: 130 [2018-10-01 00:10:37,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:10:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-01 00:10:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-01 00:10:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-01 00:10:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-10-01 00:10:37,065 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 128 [2018-10-01 00:10:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:37,066 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-10-01 00:10:37,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 00:10:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-10-01 00:10:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-01 00:10:37,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:37,066 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1] [2018-10-01 00:10:37,066 INFO L423 AbstractCegarLoop]: === Iteration 187 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:37,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:37,066 INFO L82 PathProgramCache]: Analyzing trace with hash 877895687, now seen corresponding path program 184 times [2018-10-01 00:10:37,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:37,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:37,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:37,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:37,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:39,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:39,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:39,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:10:39,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:10:39,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:39,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:39,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:39,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-01 00:10:39,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 00:10:39,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 00:10:39,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:10:39,515 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 65 states. [2018-10-01 00:10:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:44,711 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-10-01 00:10:44,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:10:44,712 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 129 [2018-10-01 00:10:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:44,713 INFO L225 Difference]: With dead ends: 197 [2018-10-01 00:10:44,713 INFO L226 Difference]: Without dead ends: 194 [2018-10-01 00:10:44,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:10:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-01 00:10:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 132. [2018-10-01 00:10:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-01 00:10:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2018-10-01 00:10:44,726 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 129 [2018-10-01 00:10:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:44,726 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2018-10-01 00:10:44,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 00:10:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2018-10-01 00:10:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-01 00:10:44,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:44,727 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1] [2018-10-01 00:10:44,727 INFO L423 AbstractCegarLoop]: === Iteration 188 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:44,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1444900999, now seen corresponding path program 185 times [2018-10-01 00:10:44,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:44,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:44,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:44,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:44,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2016 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:46,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:46,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:46,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:10:46,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2018-10-01 00:10:46,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:46,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2016 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:46,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:46,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-01 00:10:46,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 00:10:46,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 00:10:46,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-01 00:10:46,628 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 66 states. [2018-10-01 00:10:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:47,146 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2018-10-01 00:10:47,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-01 00:10:47,147 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-01 00:10:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:47,147 INFO L225 Difference]: With dead ends: 198 [2018-10-01 00:10:47,147 INFO L226 Difference]: Without dead ends: 131 [2018-10-01 00:10:47,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-01 00:10:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-01 00:10:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-01 00:10:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-01 00:10:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-01 00:10:47,157 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 130 [2018-10-01 00:10:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:47,157 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-01 00:10:47,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 00:10:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-01 00:10:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-01 00:10:47,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:47,158 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1] [2018-10-01 00:10:47,158 INFO L423 AbstractCegarLoop]: === Iteration 189 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:47,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:47,158 INFO L82 PathProgramCache]: Analyzing trace with hash 519259053, now seen corresponding path program 186 times [2018-10-01 00:10:47,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:47,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:47,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:47,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:47,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2016 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:48,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:48,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:48,919 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:49,025 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-10-01 00:10:49,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:49,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2016 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:49,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:49,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-01 00:10:49,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 00:10:49,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 00:10:49,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-01 00:10:49,072 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-10-01 00:10:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:49,350 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2018-10-01 00:10:49,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-01 00:10:49,351 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-01 00:10:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:49,351 INFO L225 Difference]: With dead ends: 135 [2018-10-01 00:10:49,351 INFO L226 Difference]: Without dead ends: 132 [2018-10-01 00:10:49,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-01 00:10:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-01 00:10:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-01 00:10:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-01 00:10:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-10-01 00:10:49,361 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 130 [2018-10-01 00:10:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:49,361 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-10-01 00:10:49,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 00:10:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-10-01 00:10:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-01 00:10:49,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:49,361 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1] [2018-10-01 00:10:49,361 INFO L423 AbstractCegarLoop]: === Iteration 190 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:49,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1082900063, now seen corresponding path program 187 times [2018-10-01 00:10:49,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:49,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:49,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:49,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:49,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:51,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:51,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:51,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:51,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:51,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:51,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-01 00:10:51,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 00:10:51,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 00:10:51,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-01 00:10:51,640 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 66 states. [2018-10-01 00:10:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:57,037 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-01 00:10:57,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-01 00:10:57,037 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 131 [2018-10-01 00:10:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:57,038 INFO L225 Difference]: With dead ends: 200 [2018-10-01 00:10:57,038 INFO L226 Difference]: Without dead ends: 197 [2018-10-01 00:10:57,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-01 00:10:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-01 00:10:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 134. [2018-10-01 00:10:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-01 00:10:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2018-10-01 00:10:57,048 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 131 [2018-10-01 00:10:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:57,048 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2018-10-01 00:10:57,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 00:10:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2018-10-01 00:10:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-01 00:10:57,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:57,049 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1] [2018-10-01 00:10:57,049 INFO L423 AbstractCegarLoop]: === Iteration 191 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:57,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash 789774893, now seen corresponding path program 188 times [2018-10-01 00:10:57,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:57,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:57,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:57,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:57,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2080 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:58,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:58,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:58,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:58,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:58,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:59,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2080 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:59,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:59,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-01 00:10:59,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-01 00:10:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-01 00:10:59,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:10:59,047 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 67 states. [2018-10-01 00:10:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:59,693 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-10-01 00:10:59,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 00:10:59,693 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-01 00:10:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:59,694 INFO L225 Difference]: With dead ends: 201 [2018-10-01 00:10:59,694 INFO L226 Difference]: Without dead ends: 133 [2018-10-01 00:10:59,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:10:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-01 00:10:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-01 00:10:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-01 00:10:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-01 00:10:59,705 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 132 [2018-10-01 00:10:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:59,705 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-01 00:10:59,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-01 00:10:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-01 00:10:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-01 00:10:59,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:59,706 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1] [2018-10-01 00:10:59,707 INFO L423 AbstractCegarLoop]: === Iteration 192 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:59,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2135321657, now seen corresponding path program 189 times [2018-10-01 00:10:59,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:59,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:59,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:59,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:59,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2080 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:01,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:01,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:01,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:11:01,481 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-01 00:11:01,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:01,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2080 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:01,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:01,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-01 00:11:01,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-01 00:11:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-01 00:11:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:11:01,532 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 67 states. [2018-10-01 00:11:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:01,801 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-01 00:11:01,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 00:11:01,802 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-01 00:11:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:01,802 INFO L225 Difference]: With dead ends: 137 [2018-10-01 00:11:01,802 INFO L226 Difference]: Without dead ends: 134 [2018-10-01 00:11:01,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:11:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-01 00:11:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-01 00:11:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-01 00:11:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2018-10-01 00:11:01,813 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 132 [2018-10-01 00:11:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:01,813 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2018-10-01 00:11:01,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-01 00:11:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2018-10-01 00:11:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-01 00:11:01,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:01,814 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1] [2018-10-01 00:11:01,814 INFO L423 AbstractCegarLoop]: === Iteration 193 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:01,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1770523449, now seen corresponding path program 190 times [2018-10-01 00:11:01,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:01,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:01,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:01,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:01,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:04,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:04,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:04,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:11:04,292 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:11:04,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:04,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:04,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:04,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-01 00:11:04,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-01 00:11:04,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-01 00:11:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:11:04,355 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 67 states. [2018-10-01 00:11:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:09,921 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2018-10-01 00:11:09,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 00:11:09,922 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 133 [2018-10-01 00:11:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:09,923 INFO L225 Difference]: With dead ends: 203 [2018-10-01 00:11:09,923 INFO L226 Difference]: Without dead ends: 200 [2018-10-01 00:11:09,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:11:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-01 00:11:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 136. [2018-10-01 00:11:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-01 00:11:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-01 00:11:09,933 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 133 [2018-10-01 00:11:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:09,933 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-01 00:11:09,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-01 00:11:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-01 00:11:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-01 00:11:09,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:09,934 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1] [2018-10-01 00:11:09,934 INFO L423 AbstractCegarLoop]: === Iteration 194 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:09,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:09,934 INFO L82 PathProgramCache]: Analyzing trace with hash 948286407, now seen corresponding path program 191 times [2018-10-01 00:11:09,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:09,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:09,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:09,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:09,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:11,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:11,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:11,577 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:11:11,704 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-01 00:11:11,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:11,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:11,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:11,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-01 00:11:11,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-01 00:11:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-01 00:11:11,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:11:11,765 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 68 states. [2018-10-01 00:11:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:12,307 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-10-01 00:11:12,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-01 00:11:12,308 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-01 00:11:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:12,309 INFO L225 Difference]: With dead ends: 204 [2018-10-01 00:11:12,309 INFO L226 Difference]: Without dead ends: 135 [2018-10-01 00:11:12,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:11:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-01 00:11:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-01 00:11:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-01 00:11:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-01 00:11:12,318 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 134 [2018-10-01 00:11:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:12,318 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-01 00:11:12,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-01 00:11:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-01 00:11:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-01 00:11:12,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:12,319 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1] [2018-10-01 00:11:12,319 INFO L423 AbstractCegarLoop]: === Iteration 195 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:12,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash 464606573, now seen corresponding path program 192 times [2018-10-01 00:11:12,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:12,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:12,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:12,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:12,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:14,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:14,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:14,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:11:14,345 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-01 00:11:14,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:14,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:14,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:14,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-01 00:11:14,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-01 00:11:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-01 00:11:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:11:14,398 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-10-01 00:11:14,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:14,636 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-10-01 00:11:14,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-01 00:11:14,636 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-01 00:11:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:14,637 INFO L225 Difference]: With dead ends: 139 [2018-10-01 00:11:14,637 INFO L226 Difference]: Without dead ends: 136 [2018-10-01 00:11:14,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:11:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-01 00:11:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-01 00:11:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-01 00:11:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-10-01 00:11:14,647 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 134 [2018-10-01 00:11:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:14,647 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-10-01 00:11:14,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-01 00:11:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-10-01 00:11:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-01 00:11:14,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:14,648 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1] [2018-10-01 00:11:14,648 INFO L423 AbstractCegarLoop]: === Iteration 196 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:14,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:14,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1517840353, now seen corresponding path program 193 times [2018-10-01 00:11:14,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:14,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:14,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:14,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:14,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:16,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:16,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:16,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:11:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:16,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:17,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:17,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-01 00:11:17,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-01 00:11:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-01 00:11:17,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:11:17,033 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 68 states. [2018-10-01 00:11:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:22,769 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-01 00:11:22,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-01 00:11:22,769 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 135 [2018-10-01 00:11:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:22,770 INFO L225 Difference]: With dead ends: 206 [2018-10-01 00:11:22,770 INFO L226 Difference]: Without dead ends: 203 [2018-10-01 00:11:22,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:11:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-01 00:11:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 138. [2018-10-01 00:11:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-01 00:11:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2018-10-01 00:11:22,780 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 135 [2018-10-01 00:11:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:22,780 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2018-10-01 00:11:22,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-01 00:11:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2018-10-01 00:11:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-01 00:11:22,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:22,781 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1] [2018-10-01 00:11:22,781 INFO L423 AbstractCegarLoop]: === Iteration 197 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:22,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:22,781 INFO L82 PathProgramCache]: Analyzing trace with hash -191650835, now seen corresponding path program 194 times [2018-10-01 00:11:22,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:22,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:22,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:22,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:11:22,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:24,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:24,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:24,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:11:24,656 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:11:24,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:24,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:24,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:24,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-01 00:11:24,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-01 00:11:24,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-01 00:11:24,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:11:24,707 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 69 states. [2018-10-01 00:11:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:25,553 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2018-10-01 00:11:25,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 00:11:25,553 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-01 00:11:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:25,554 INFO L225 Difference]: With dead ends: 207 [2018-10-01 00:11:25,554 INFO L226 Difference]: Without dead ends: 137 [2018-10-01 00:11:25,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:11:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-01 00:11:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-01 00:11:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-01 00:11:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-01 00:11:25,565 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 136 [2018-10-01 00:11:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:25,565 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-01 00:11:25,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-01 00:11:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-01 00:11:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-01 00:11:25,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:25,565 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1] [2018-10-01 00:11:25,566 INFO L423 AbstractCegarLoop]: === Iteration 198 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:25,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1994143495, now seen corresponding path program 195 times [2018-10-01 00:11:25,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:25,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:25,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:25,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:25,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:27,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:27,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:27,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:11:27,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-01 00:11:27,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:27,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:27,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:27,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-01 00:11:27,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-01 00:11:27,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-01 00:11:27,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:11:27,527 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 69 states. [2018-10-01 00:11:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:27,787 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-01 00:11:27,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 00:11:27,787 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-01 00:11:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:27,788 INFO L225 Difference]: With dead ends: 141 [2018-10-01 00:11:27,788 INFO L226 Difference]: Without dead ends: 138 [2018-10-01 00:11:27,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:11:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-01 00:11:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-01 00:11:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-01 00:11:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-10-01 00:11:27,800 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2018-10-01 00:11:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:27,800 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-10-01 00:11:27,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-01 00:11:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-10-01 00:11:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-01 00:11:27,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:27,800 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1] [2018-10-01 00:11:27,801 INFO L423 AbstractCegarLoop]: === Iteration 199 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:27,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1688844679, now seen corresponding path program 196 times [2018-10-01 00:11:27,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:27,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:27,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:27,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:27,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:30,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:30,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:30,102 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:11:30,194 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:11:30,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:30,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:30,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:30,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-01 00:11:30,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-01 00:11:30,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-01 00:11:30,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:11:30,257 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 69 states. [2018-10-01 00:11:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:35,995 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-10-01 00:11:35,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 00:11:35,995 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 137 [2018-10-01 00:11:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:35,996 INFO L225 Difference]: With dead ends: 209 [2018-10-01 00:11:35,996 INFO L226 Difference]: Without dead ends: 206 [2018-10-01 00:11:35,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:11:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-01 00:11:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 140. [2018-10-01 00:11:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-01 00:11:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-01 00:11:36,006 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-10-01 00:11:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:36,007 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-01 00:11:36,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-01 00:11:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-01 00:11:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-01 00:11:36,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:36,007 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1] [2018-10-01 00:11:36,007 INFO L423 AbstractCegarLoop]: === Iteration 200 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:36,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:36,008 INFO L82 PathProgramCache]: Analyzing trace with hash 814515975, now seen corresponding path program 197 times [2018-10-01 00:11:36,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:36,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:36,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:36,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:36,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:37,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:37,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:37,667 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:11:37,815 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2018-10-01 00:11:37,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:37,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:37,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:37,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-01 00:11:37,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 00:11:37,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 00:11:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:11:37,870 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 70 states. [2018-10-01 00:11:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:38,734 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2018-10-01 00:11:38,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 00:11:38,734 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-01 00:11:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:38,735 INFO L225 Difference]: With dead ends: 210 [2018-10-01 00:11:38,735 INFO L226 Difference]: Without dead ends: 139 [2018-10-01 00:11:38,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:11:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-01 00:11:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-01 00:11:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-01 00:11:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-01 00:11:38,745 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 138 [2018-10-01 00:11:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:38,745 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-01 00:11:38,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 00:11:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-01 00:11:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-01 00:11:38,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:38,746 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1] [2018-10-01 00:11:38,746 INFO L423 AbstractCegarLoop]: === Iteration 201 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:38,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash -145336531, now seen corresponding path program 198 times [2018-10-01 00:11:38,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:38,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:38,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:38,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:38,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:40,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:40,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:40,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:11:40,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-01 00:11:40,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:40,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:40,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:40,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-01 00:11:40,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 00:11:40,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 00:11:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:11:40,788 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-10-01 00:11:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:41,055 INFO L93 Difference]: Finished difference Result 143 states and 144 transitions. [2018-10-01 00:11:41,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 00:11:41,055 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-01 00:11:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:41,055 INFO L225 Difference]: With dead ends: 143 [2018-10-01 00:11:41,055 INFO L226 Difference]: Without dead ends: 140 [2018-10-01 00:11:41,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:11:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-01 00:11:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-01 00:11:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-01 00:11:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2018-10-01 00:11:41,068 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 138 [2018-10-01 00:11:41,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:41,068 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2018-10-01 00:11:41,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 00:11:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2018-10-01 00:11:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-01 00:11:41,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:41,069 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1] [2018-10-01 00:11:41,070 INFO L423 AbstractCegarLoop]: === Iteration 202 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:41,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash -210526687, now seen corresponding path program 199 times [2018-10-01 00:11:41,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:41,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:41,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:41,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:41,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:43,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:43,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:43,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:11:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:43,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:43,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:43,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-01 00:11:43,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 00:11:43,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 00:11:43,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:11:43,586 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 70 states. [2018-10-01 00:11:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:49,566 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-01 00:11:49,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 00:11:49,566 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 139 [2018-10-01 00:11:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:49,567 INFO L225 Difference]: With dead ends: 212 [2018-10-01 00:11:49,567 INFO L226 Difference]: Without dead ends: 209 [2018-10-01 00:11:49,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:11:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-01 00:11:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 142. [2018-10-01 00:11:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-01 00:11:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-10-01 00:11:49,576 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 139 [2018-10-01 00:11:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:49,576 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-10-01 00:11:49,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 00:11:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-10-01 00:11:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-01 00:11:49,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:49,577 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1] [2018-10-01 00:11:49,577 INFO L423 AbstractCegarLoop]: === Iteration 203 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:49,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:49,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2063545773, now seen corresponding path program 200 times [2018-10-01 00:11:49,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:49,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:49,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:49,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:11:49,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2346 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:51,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:51,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:51,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:11:51,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:11:51,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:51,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2346 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:51,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:51,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-01 00:11:51,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:11:51,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:11:51,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:11:51,473 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 71 states. [2018-10-01 00:11:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:52,345 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2018-10-01 00:11:52,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:11:52,345 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-01 00:11:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:52,346 INFO L225 Difference]: With dead ends: 213 [2018-10-01 00:11:52,346 INFO L226 Difference]: Without dead ends: 141 [2018-10-01 00:11:52,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:11:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-01 00:11:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-01 00:11:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-01 00:11:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-01 00:11:52,358 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 140 [2018-10-01 00:11:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:52,358 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-01 00:11:52,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:11:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-01 00:11:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-01 00:11:52,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:52,359 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1] [2018-10-01 00:11:52,359 INFO L423 AbstractCegarLoop]: === Iteration 204 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:52,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1922078137, now seen corresponding path program 201 times [2018-10-01 00:11:52,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:52,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:52,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:52,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:52,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2346 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:54,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:54,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:54,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:11:54,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-10-01 00:11:54,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:54,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2346 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:54,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:54,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-01 00:11:54,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:11:54,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:11:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:11:54,424 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 71 states. [2018-10-01 00:11:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:54,736 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-01 00:11:54,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:11:54,736 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-01 00:11:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:54,737 INFO L225 Difference]: With dead ends: 145 [2018-10-01 00:11:54,737 INFO L226 Difference]: Without dead ends: 142 [2018-10-01 00:11:54,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:11:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-01 00:11:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-01 00:11:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-01 00:11:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-10-01 00:11:54,750 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 140 [2018-10-01 00:11:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:54,750 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-10-01 00:11:54,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:11:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-10-01 00:11:54,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-01 00:11:54,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:54,751 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1] [2018-10-01 00:11:54,751 INFO L423 AbstractCegarLoop]: === Iteration 205 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:54,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash 545058375, now seen corresponding path program 202 times [2018-10-01 00:11:54,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:54,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:54,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:54,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:54,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:57,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:57,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:57,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:11:57,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:11:57,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:57,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:57,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:57,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-01 00:11:57,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:11:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:11:57,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:11:57,298 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 71 states. [2018-10-01 00:12:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:03,400 INFO L93 Difference]: Finished difference Result 215 states and 217 transitions. [2018-10-01 00:12:03,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:12:03,400 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 141 [2018-10-01 00:12:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:03,401 INFO L225 Difference]: With dead ends: 215 [2018-10-01 00:12:03,401 INFO L226 Difference]: Without dead ends: 212 [2018-10-01 00:12:03,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:12:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-01 00:12:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2018-10-01 00:12:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-01 00:12:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2018-10-01 00:12:03,411 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 141 [2018-10-01 00:12:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:03,412 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2018-10-01 00:12:03,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:12:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2018-10-01 00:12:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-01 00:12:03,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:03,412 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1] [2018-10-01 00:12:03,412 INFO L423 AbstractCegarLoop]: === Iteration 206 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:03,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -283121081, now seen corresponding path program 203 times [2018-10-01 00:12:03,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:03,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:03,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:03,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:03,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2415 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:05,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:05,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:05,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:12:05,423 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-01 00:12:05,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:05,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2415 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:05,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:05,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-01 00:12:05,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 00:12:05,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 00:12:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:12:05,479 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 72 states. [2018-10-01 00:12:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:06,370 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2018-10-01 00:12:06,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 00:12:06,371 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-01 00:12:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:06,371 INFO L225 Difference]: With dead ends: 216 [2018-10-01 00:12:06,371 INFO L226 Difference]: Without dead ends: 143 [2018-10-01 00:12:06,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:12:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-01 00:12:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-01 00:12:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-01 00:12:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-01 00:12:06,382 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 142 [2018-10-01 00:12:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:06,383 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-01 00:12:06,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 00:12:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-01 00:12:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-01 00:12:06,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:06,383 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1] [2018-10-01 00:12:06,383 INFO L423 AbstractCegarLoop]: === Iteration 207 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:06,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash 716589293, now seen corresponding path program 204 times [2018-10-01 00:12:06,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:06,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:06,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:06,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:06,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2415 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:08,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:08,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:08,239 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:12:08,358 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2018-10-01 00:12:08,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:08,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2415 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:08,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:08,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-01 00:12:08,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 00:12:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 00:12:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:12:08,414 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-10-01 00:12:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:08,700 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2018-10-01 00:12:08,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 00:12:08,700 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-01 00:12:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:08,701 INFO L225 Difference]: With dead ends: 147 [2018-10-01 00:12:08,701 INFO L226 Difference]: Without dead ends: 144 [2018-10-01 00:12:08,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:12:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-01 00:12:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-01 00:12:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-01 00:12:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-10-01 00:12:08,715 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 142 [2018-10-01 00:12:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:08,715 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-10-01 00:12:08,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 00:12:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-10-01 00:12:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-01 00:12:08,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:08,716 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1] [2018-10-01 00:12:08,716 INFO L423 AbstractCegarLoop]: === Iteration 208 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:08,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:08,717 INFO L82 PathProgramCache]: Analyzing trace with hash 739370081, now seen corresponding path program 205 times [2018-10-01 00:12:08,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:08,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:08,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:08,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:08,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:11,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:11,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:11,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:12:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:11,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:11,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:11,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-01 00:12:11,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 00:12:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 00:12:11,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:12:11,484 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 72 states. [2018-10-01 00:12:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:17,759 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-01 00:12:17,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 00:12:17,760 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 143 [2018-10-01 00:12:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:17,761 INFO L225 Difference]: With dead ends: 218 [2018-10-01 00:12:17,761 INFO L226 Difference]: Without dead ends: 215 [2018-10-01 00:12:17,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 209 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:12:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-01 00:12:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 146. [2018-10-01 00:12:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-01 00:12:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-10-01 00:12:17,775 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 143 [2018-10-01 00:12:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:17,776 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-10-01 00:12:17,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 00:12:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-10-01 00:12:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-01 00:12:17,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:17,777 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1] [2018-10-01 00:12:17,777 INFO L423 AbstractCegarLoop]: === Iteration 209 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:17,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:17,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1445574509, now seen corresponding path program 206 times [2018-10-01 00:12:17,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:17,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:17,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:17,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:12:17,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:19,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:19,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:19,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:12:19,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:12:19,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:19,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:19,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:19,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-01 00:12:19,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 00:12:19,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 00:12:19,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:12:19,831 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 73 states. [2018-10-01 00:12:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:20,535 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2018-10-01 00:12:20,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 00:12:20,536 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-01 00:12:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:20,536 INFO L225 Difference]: With dead ends: 219 [2018-10-01 00:12:20,536 INFO L226 Difference]: Without dead ends: 145 [2018-10-01 00:12:20,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:12:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-01 00:12:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-01 00:12:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-01 00:12:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-01 00:12:20,547 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 144 [2018-10-01 00:12:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:20,547 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-01 00:12:20,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 00:12:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-01 00:12:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-01 00:12:20,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:20,548 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1] [2018-10-01 00:12:20,548 INFO L423 AbstractCegarLoop]: === Iteration 210 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:20,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1923142265, now seen corresponding path program 207 times [2018-10-01 00:12:20,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:20,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:20,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:20,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:20,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:22,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:22,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:22,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:12:22,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-01 00:12:22,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:22,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:22,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:22,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-01 00:12:22,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 00:12:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 00:12:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:12:22,685 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 73 states. [2018-10-01 00:12:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:23,004 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-01 00:12:23,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 00:12:23,004 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-01 00:12:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:23,005 INFO L225 Difference]: With dead ends: 149 [2018-10-01 00:12:23,005 INFO L226 Difference]: Without dead ends: 146 [2018-10-01 00:12:23,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:12:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-01 00:12:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-01 00:12:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-01 00:12:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2018-10-01 00:12:23,015 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 144 [2018-10-01 00:12:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:23,016 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2018-10-01 00:12:23,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 00:12:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2018-10-01 00:12:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-01 00:12:23,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:23,016 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1] [2018-10-01 00:12:23,016 INFO L423 AbstractCegarLoop]: === Iteration 211 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:23,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash 512070407, now seen corresponding path program 208 times [2018-10-01 00:12:23,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:23,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:23,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:23,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:23,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:25,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:25,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:25,553 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:12:25,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:12:25,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:25,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:25,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:25,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-01 00:12:25,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 00:12:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 00:12:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:12:25,720 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 73 states. [2018-10-01 00:12:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:32,134 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-10-01 00:12:32,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 00:12:32,135 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 145 [2018-10-01 00:12:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:32,135 INFO L225 Difference]: With dead ends: 221 [2018-10-01 00:12:32,135 INFO L226 Difference]: Without dead ends: 218 [2018-10-01 00:12:32,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:12:32,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-01 00:12:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 148. [2018-10-01 00:12:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-01 00:12:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-10-01 00:12:32,146 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 145 [2018-10-01 00:12:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:32,146 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-10-01 00:12:32,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 00:12:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-10-01 00:12:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-01 00:12:32,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:32,147 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1] [2018-10-01 00:12:32,147 INFO L423 AbstractCegarLoop]: === Iteration 212 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:32,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:32,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1305748089, now seen corresponding path program 209 times [2018-10-01 00:12:32,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:32,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:32,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:32,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:32,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:34,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:34,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:34,052 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:12:34,194 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-01 00:12:34,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:34,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:34,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:34,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-01 00:12:34,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 00:12:34,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 00:12:34,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:12:34,249 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 74 states. [2018-10-01 00:12:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:35,228 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2018-10-01 00:12:35,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 00:12:35,228 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-01 00:12:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:35,229 INFO L225 Difference]: With dead ends: 222 [2018-10-01 00:12:35,229 INFO L226 Difference]: Without dead ends: 147 [2018-10-01 00:12:35,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:12:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-01 00:12:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-01 00:12:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-01 00:12:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-01 00:12:35,240 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 146 [2018-10-01 00:12:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:35,240 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-01 00:12:35,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 00:12:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-01 00:12:35,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-01 00:12:35,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:35,241 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1] [2018-10-01 00:12:35,241 INFO L423 AbstractCegarLoop]: === Iteration 213 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:35,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1638214317, now seen corresponding path program 210 times [2018-10-01 00:12:35,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:35,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:35,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:35,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:35,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:37,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:37,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:37,301 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:12:37,426 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-01 00:12:37,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:37,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:37,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:37,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-01 00:12:37,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 00:12:37,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 00:12:37,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:12:37,483 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-10-01 00:12:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:37,764 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-10-01 00:12:37,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 00:12:37,765 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-01 00:12:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:37,765 INFO L225 Difference]: With dead ends: 151 [2018-10-01 00:12:37,765 INFO L226 Difference]: Without dead ends: 148 [2018-10-01 00:12:37,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:12:37,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-01 00:12:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-01 00:12:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-01 00:12:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-10-01 00:12:37,777 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 146 [2018-10-01 00:12:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:37,778 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-10-01 00:12:37,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 00:12:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-10-01 00:12:37,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-01 00:12:37,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:37,778 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1] [2018-10-01 00:12:37,778 INFO L423 AbstractCegarLoop]: === Iteration 214 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:37,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -755025247, now seen corresponding path program 211 times [2018-10-01 00:12:37,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:37,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:37,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:37,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:37,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:40,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:40,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:40,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:12:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:40,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:40,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:40,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-01 00:12:40,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 00:12:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 00:12:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:12:40,489 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 74 states. [2018-10-01 00:12:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:47,123 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-01 00:12:47,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 00:12:47,124 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 147 [2018-10-01 00:12:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:47,124 INFO L225 Difference]: With dead ends: 224 [2018-10-01 00:12:47,124 INFO L226 Difference]: Without dead ends: 221 [2018-10-01 00:12:47,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:12:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-01 00:12:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 150. [2018-10-01 00:12:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-01 00:12:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-01 00:12:47,136 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 147 [2018-10-01 00:12:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:47,136 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-01 00:12:47,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 00:12:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-01 00:12:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-01 00:12:47,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:47,137 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1] [2018-10-01 00:12:47,137 INFO L423 AbstractCegarLoop]: === Iteration 215 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:47,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1931007699, now seen corresponding path program 212 times [2018-10-01 00:12:47,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:47,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:47,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:47,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:12:47,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2628 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:49,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:49,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:49,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:12:49,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:12:49,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:49,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2628 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:49,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:49,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-01 00:12:49,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 00:12:49,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 00:12:49,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:12:49,229 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 75 states. [2018-10-01 00:12:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:50,143 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2018-10-01 00:12:50,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 00:12:50,144 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-01 00:12:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:50,144 INFO L225 Difference]: With dead ends: 225 [2018-10-01 00:12:50,145 INFO L226 Difference]: Without dead ends: 149 [2018-10-01 00:12:50,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:12:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-01 00:12:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-01 00:12:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-01 00:12:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-01 00:12:50,156 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 148 [2018-10-01 00:12:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:50,156 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-01 00:12:50,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 00:12:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-01 00:12:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-01 00:12:50,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:50,157 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1] [2018-10-01 00:12:50,157 INFO L423 AbstractCegarLoop]: === Iteration 216 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:50,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -862486329, now seen corresponding path program 213 times [2018-10-01 00:12:50,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:50,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:50,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:50,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:50,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2628 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:52,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:52,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:52,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:12:52,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-10-01 00:12:52,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:52,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2628 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:52,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:52,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-01 00:12:52,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 00:12:52,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 00:12:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:12:52,378 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 75 states. [2018-10-01 00:12:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:52,727 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-01 00:12:52,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 00:12:52,728 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-01 00:12:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:52,728 INFO L225 Difference]: With dead ends: 153 [2018-10-01 00:12:52,729 INFO L226 Difference]: Without dead ends: 150 [2018-10-01 00:12:52,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:12:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-01 00:12:52,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-01 00:12:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-01 00:12:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-10-01 00:12:52,739 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 148 [2018-10-01 00:12:52,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:52,740 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-10-01 00:12:52,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 00:12:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-10-01 00:12:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-01 00:12:52,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:52,740 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1] [2018-10-01 00:12:52,740 INFO L423 AbstractCegarLoop]: === Iteration 217 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:52,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash -967333945, now seen corresponding path program 214 times [2018-10-01 00:12:52,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:52,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:52,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:52,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:52,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:55,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:55,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:55,371 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:12:55,474 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:12:55,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:55,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:55,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:55,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-01 00:12:55,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 00:12:55,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 00:12:55,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:12:55,569 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 75 states. [2018-10-01 00:13:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:02,316 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2018-10-01 00:13:02,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 00:13:02,317 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 149 [2018-10-01 00:13:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:02,318 INFO L225 Difference]: With dead ends: 227 [2018-10-01 00:13:02,318 INFO L226 Difference]: Without dead ends: 224 [2018-10-01 00:13:02,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:13:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-10-01 00:13:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2018-10-01 00:13:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-01 00:13:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2018-10-01 00:13:02,333 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 149 [2018-10-01 00:13:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:02,333 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2018-10-01 00:13:02,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 00:13:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2018-10-01 00:13:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-01 00:13:02,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:02,334 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1] [2018-10-01 00:13:02,335 INFO L423 AbstractCegarLoop]: === Iteration 218 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:02,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash 77357255, now seen corresponding path program 215 times [2018-10-01 00:13:02,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:02,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:02,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:02,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:02,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:04,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:04,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:04,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:13:04,592 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-01 00:13:04,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:04,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:04,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:04,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-01 00:13:04,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-01 00:13:04,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-01 00:13:04,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:13:04,650 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 76 states. [2018-10-01 00:13:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:05,651 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2018-10-01 00:13:05,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 00:13:05,651 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-01 00:13:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:05,652 INFO L225 Difference]: With dead ends: 228 [2018-10-01 00:13:05,652 INFO L226 Difference]: Without dead ends: 151 [2018-10-01 00:13:05,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:13:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-01 00:13:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-01 00:13:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-01 00:13:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-01 00:13:05,667 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 150 [2018-10-01 00:13:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:05,667 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-01 00:13:05,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-01 00:13:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-01 00:13:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-01 00:13:05,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:05,668 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1] [2018-10-01 00:13:05,669 INFO L423 AbstractCegarLoop]: === Iteration 219 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:05,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1158218643, now seen corresponding path program 216 times [2018-10-01 00:13:05,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:05,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:05,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:05,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:05,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:07,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:07,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:07,997 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:13:08,126 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-01 00:13:08,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:08,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:08,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:08,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-01 00:13:08,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-01 00:13:08,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-01 00:13:08,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:13:08,184 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-10-01 00:13:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:08,535 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2018-10-01 00:13:08,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 00:13:08,535 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-01 00:13:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:08,536 INFO L225 Difference]: With dead ends: 155 [2018-10-01 00:13:08,536 INFO L226 Difference]: Without dead ends: 152 [2018-10-01 00:13:08,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:13:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-01 00:13:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-01 00:13:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-01 00:13:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2018-10-01 00:13:08,547 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 150 [2018-10-01 00:13:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:08,548 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2018-10-01 00:13:08,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-01 00:13:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2018-10-01 00:13:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-01 00:13:08,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:08,548 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1] [2018-10-01 00:13:08,548 INFO L423 AbstractCegarLoop]: === Iteration 220 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:08,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:08,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1545101087, now seen corresponding path program 217 times [2018-10-01 00:13:08,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:08,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:08,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:08,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:08,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:11,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:11,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:11,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:13:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:11,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:11,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:11,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-01 00:13:11,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-01 00:13:11,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-01 00:13:11,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:13:11,423 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 76 states. [2018-10-01 00:13:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:18,376 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-01 00:13:18,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 00:13:18,377 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 151 [2018-10-01 00:13:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:18,377 INFO L225 Difference]: With dead ends: 230 [2018-10-01 00:13:18,377 INFO L226 Difference]: Without dead ends: 227 [2018-10-01 00:13:18,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:13:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-01 00:13:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 154. [2018-10-01 00:13:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-01 00:13:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-10-01 00:13:18,393 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 151 [2018-10-01 00:13:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:18,393 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-10-01 00:13:18,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-01 00:13:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-10-01 00:13:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-01 00:13:18,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:18,394 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1] [2018-10-01 00:13:18,394 INFO L423 AbstractCegarLoop]: === Iteration 221 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:18,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:18,395 INFO L82 PathProgramCache]: Analyzing trace with hash -653554963, now seen corresponding path program 218 times [2018-10-01 00:13:18,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:18,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:18,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:18,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:13:18,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2775 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:20,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:20,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:20,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:13:20,687 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:13:20,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:20,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2775 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:20,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:20,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-01 00:13:20,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:13:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:13:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:13:20,745 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 77 states. [2018-10-01 00:13:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:21,785 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2018-10-01 00:13:21,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 00:13:21,786 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-01 00:13:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:21,786 INFO L225 Difference]: With dead ends: 231 [2018-10-01 00:13:21,786 INFO L226 Difference]: Without dead ends: 153 [2018-10-01 00:13:21,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:13:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-01 00:13:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-01 00:13:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-01 00:13:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-01 00:13:21,798 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 152 [2018-10-01 00:13:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:21,798 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-01 00:13:21,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:13:21,798 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-01 00:13:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-01 00:13:21,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:21,799 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1] [2018-10-01 00:13:21,799 INFO L423 AbstractCegarLoop]: === Iteration 222 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:21,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash -301702137, now seen corresponding path program 219 times [2018-10-01 00:13:21,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:21,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:21,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:21,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:21,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2775 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:23,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:23,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:23,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:13:24,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2018-10-01 00:13:24,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:24,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2775 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:24,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:24,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-01 00:13:24,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:13:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:13:24,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:13:24,133 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 77 states. [2018-10-01 00:13:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:24,453 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-01 00:13:24,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 00:13:24,453 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-01 00:13:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:24,454 INFO L225 Difference]: With dead ends: 157 [2018-10-01 00:13:24,454 INFO L226 Difference]: Without dead ends: 154 [2018-10-01 00:13:24,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:13:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-01 00:13:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-01 00:13:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-01 00:13:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-10-01 00:13:24,466 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 152 [2018-10-01 00:13:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:24,466 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-10-01 00:13:24,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:13:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-10-01 00:13:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-01 00:13:24,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:24,467 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1] [2018-10-01 00:13:24,467 INFO L423 AbstractCegarLoop]: === Iteration 223 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:24,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash -762893177, now seen corresponding path program 220 times [2018-10-01 00:13:24,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:24,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:24,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:24,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:24,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:27,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:27,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:27,320 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:13:27,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:13:27,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:27,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:27,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:27,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-01 00:13:27,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:13:27,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:13:27,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:13:27,494 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 77 states. [2018-10-01 00:13:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:34,614 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-10-01 00:13:34,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 00:13:34,614 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 153 [2018-10-01 00:13:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:34,615 INFO L225 Difference]: With dead ends: 233 [2018-10-01 00:13:34,615 INFO L226 Difference]: Without dead ends: 230 [2018-10-01 00:13:34,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:13:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-01 00:13:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 156. [2018-10-01 00:13:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-01 00:13:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-10-01 00:13:34,627 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 153 [2018-10-01 00:13:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:34,628 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-10-01 00:13:34,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:13:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-10-01 00:13:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-01 00:13:34,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:34,628 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1] [2018-10-01 00:13:34,628 INFO L423 AbstractCegarLoop]: === Iteration 224 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:34,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:34,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2120053767, now seen corresponding path program 221 times [2018-10-01 00:13:34,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:34,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:34,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:34,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:34,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:36,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:36,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:36,707 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:13:36,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2018-10-01 00:13:36,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:36,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:36,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:36,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-01 00:13:36,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 00:13:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 00:13:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:13:36,922 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 78 states. [2018-10-01 00:13:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:37,773 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2018-10-01 00:13:37,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 00:13:37,774 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-01 00:13:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:37,774 INFO L225 Difference]: With dead ends: 234 [2018-10-01 00:13:37,774 INFO L226 Difference]: Without dead ends: 155 [2018-10-01 00:13:37,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:13:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-01 00:13:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-01 00:13:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-01 00:13:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-01 00:13:37,786 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 154 [2018-10-01 00:13:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:37,786 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-01 00:13:37,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 00:13:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-01 00:13:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-01 00:13:37,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:37,787 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1] [2018-10-01 00:13:37,787 INFO L423 AbstractCegarLoop]: === Iteration 225 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:37,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:37,788 INFO L82 PathProgramCache]: Analyzing trace with hash 142589485, now seen corresponding path program 222 times [2018-10-01 00:13:37,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:37,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:37,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:37,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:37,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:39,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:39,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:39,976 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:13:40,128 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-01 00:13:40,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:40,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:40,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:40,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-01 00:13:40,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 00:13:40,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 00:13:40,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:13:40,196 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-10-01 00:13:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:40,470 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2018-10-01 00:13:40,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 00:13:40,471 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-01 00:13:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:40,471 INFO L225 Difference]: With dead ends: 159 [2018-10-01 00:13:40,471 INFO L226 Difference]: Without dead ends: 156 [2018-10-01 00:13:40,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:13:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-01 00:13:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-01 00:13:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-01 00:13:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-10-01 00:13:40,482 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 154 [2018-10-01 00:13:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:40,482 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-10-01 00:13:40,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 00:13:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-10-01 00:13:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-01 00:13:40,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:40,483 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1] [2018-10-01 00:13:40,483 INFO L423 AbstractCegarLoop]: === Iteration 226 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:40,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:40,483 INFO L82 PathProgramCache]: Analyzing trace with hash 125245217, now seen corresponding path program 223 times [2018-10-01 00:13:40,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:40,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:40,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:40,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:40,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:43,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:43,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:43,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:13:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:43,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:43,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:43,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-01 00:13:43,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 00:13:43,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 00:13:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:13:43,475 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 78 states. [2018-10-01 00:13:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:50,792 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-01 00:13:50,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 00:13:50,793 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 155 [2018-10-01 00:13:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:50,793 INFO L225 Difference]: With dead ends: 236 [2018-10-01 00:13:50,793 INFO L226 Difference]: Without dead ends: 233 [2018-10-01 00:13:50,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:13:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-01 00:13:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 158. [2018-10-01 00:13:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-01 00:13:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-10-01 00:13:50,806 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-10-01 00:13:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:50,806 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-10-01 00:13:50,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 00:13:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-10-01 00:13:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-01 00:13:50,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:50,806 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1] [2018-10-01 00:13:50,807 INFO L423 AbstractCegarLoop]: === Iteration 227 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:50,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:50,807 INFO L82 PathProgramCache]: Analyzing trace with hash -412427091, now seen corresponding path program 224 times [2018-10-01 00:13:50,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:50,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:50,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:50,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:13:50,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:52,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:52,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:52,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:13:53,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:13:53,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:53,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:53,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:53,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-01 00:13:53,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-01 00:13:53,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-01 00:13:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:13:53,080 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 79 states. [2018-10-01 00:13:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:53,773 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2018-10-01 00:13:53,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 00:13:53,773 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-01 00:13:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:53,774 INFO L225 Difference]: With dead ends: 237 [2018-10-01 00:13:53,774 INFO L226 Difference]: Without dead ends: 157 [2018-10-01 00:13:53,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:13:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-01 00:13:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-01 00:13:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-01 00:13:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-01 00:13:53,786 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 156 [2018-10-01 00:13:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:53,786 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-01 00:13:53,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-01 00:13:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-01 00:13:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-01 00:13:53,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:53,787 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1] [2018-10-01 00:13:53,787 INFO L423 AbstractCegarLoop]: === Iteration 228 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:53,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:53,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1584277689, now seen corresponding path program 225 times [2018-10-01 00:13:53,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:53,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:53,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:53,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:53,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:56,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:56,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:56,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:13:56,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-01 00:13:56,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:56,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:56,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:56,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-01 00:13:56,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-01 00:13:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-01 00:13:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:13:56,251 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 79 states. [2018-10-01 00:13:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:56,536 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-01 00:13:56,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 00:13:56,537 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-01 00:13:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:56,537 INFO L225 Difference]: With dead ends: 161 [2018-10-01 00:13:56,537 INFO L226 Difference]: Without dead ends: 158 [2018-10-01 00:13:56,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:13:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-01 00:13:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-01 00:13:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-01 00:13:56,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2018-10-01 00:13:56,549 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 156 [2018-10-01 00:13:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:56,549 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2018-10-01 00:13:56,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-01 00:13:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2018-10-01 00:13:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-01 00:13:56,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:56,550 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1] [2018-10-01 00:13:56,550 INFO L423 AbstractCegarLoop]: === Iteration 229 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:56,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1868029625, now seen corresponding path program 226 times [2018-10-01 00:13:56,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:56,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:56,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:56,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:56,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:59,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:59,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:59,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:13:59,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:13:59,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:59,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:59,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:59,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-01 00:13:59,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-01 00:13:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-01 00:13:59,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:13:59,635 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 79 states. [2018-10-01 00:14:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:07,163 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2018-10-01 00:14:07,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 00:14:07,164 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 157 [2018-10-01 00:14:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:07,165 INFO L225 Difference]: With dead ends: 239 [2018-10-01 00:14:07,165 INFO L226 Difference]: Without dead ends: 236 [2018-10-01 00:14:07,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:14:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-10-01 00:14:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 160. [2018-10-01 00:14:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-01 00:14:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-01 00:14:07,177 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 157 [2018-10-01 00:14:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:07,177 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-01 00:14:07,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-01 00:14:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-01 00:14:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-01 00:14:07,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:07,178 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1] [2018-10-01 00:14:07,178 INFO L423 AbstractCegarLoop]: === Iteration 230 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:07,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2074405049, now seen corresponding path program 227 times [2018-10-01 00:14:07,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:07,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:07,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:07,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:07,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 3003 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:09,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:09,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:09,347 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:14:09,509 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-01 00:14:09,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:09,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 3003 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:09,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:09,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-01 00:14:09,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 00:14:09,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 00:14:09,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:14:09,569 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 80 states. [2018-10-01 00:14:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:10,267 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2018-10-01 00:14:10,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-01 00:14:10,267 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-01 00:14:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:10,268 INFO L225 Difference]: With dead ends: 240 [2018-10-01 00:14:10,268 INFO L226 Difference]: Without dead ends: 159 [2018-10-01 00:14:10,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:14:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-01 00:14:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-01 00:14:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-01 00:14:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-01 00:14:10,280 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 158 [2018-10-01 00:14:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:10,280 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-01 00:14:10,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 00:14:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-01 00:14:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-01 00:14:10,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:10,281 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1] [2018-10-01 00:14:10,281 INFO L423 AbstractCegarLoop]: === Iteration 231 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:10,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:10,281 INFO L82 PathProgramCache]: Analyzing trace with hash 252932077, now seen corresponding path program 228 times [2018-10-01 00:14:10,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:10,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:10,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:10,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:10,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 3003 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:12,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:12,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:12,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:14:12,729 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-01 00:14:12,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:12,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 3003 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:12,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:12,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-01 00:14:12,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 00:14:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 00:14:12,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:14:12,789 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-10-01 00:14:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:13,080 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-10-01 00:14:13,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-01 00:14:13,081 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-01 00:14:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:13,082 INFO L225 Difference]: With dead ends: 163 [2018-10-01 00:14:13,082 INFO L226 Difference]: Without dead ends: 160 [2018-10-01 00:14:13,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:14:13,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-01 00:14:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-01 00:14:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-01 00:14:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-10-01 00:14:13,094 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 158 [2018-10-01 00:14:13,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:13,095 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-10-01 00:14:13,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 00:14:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-10-01 00:14:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-01 00:14:13,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:13,095 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1] [2018-10-01 00:14:13,095 INFO L423 AbstractCegarLoop]: === Iteration 232 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:13,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash -749101727, now seen corresponding path program 229 times [2018-10-01 00:14:13,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:13,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:13,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:13,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:13,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:16,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:16,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:16,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:14:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:16,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:16,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:16,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-01 00:14:16,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 00:14:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 00:14:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:14:16,226 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 80 states. [2018-10-01 00:14:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:23,929 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-01 00:14:23,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-01 00:14:23,930 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 159 [2018-10-01 00:14:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:23,931 INFO L225 Difference]: With dead ends: 242 [2018-10-01 00:14:23,931 INFO L226 Difference]: Without dead ends: 239 [2018-10-01 00:14:23,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:14:23,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-01 00:14:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2018-10-01 00:14:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-01 00:14:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2018-10-01 00:14:23,943 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 159 [2018-10-01 00:14:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:23,943 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2018-10-01 00:14:23,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 00:14:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2018-10-01 00:14:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-01 00:14:23,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:23,944 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1] [2018-10-01 00:14:23,944 INFO L423 AbstractCegarLoop]: === Iteration 233 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:23,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1747378579, now seen corresponding path program 230 times [2018-10-01 00:14:23,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:23,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:23,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:23,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:14:23,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3081 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:26,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:26,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:26,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:14:26,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:14:26,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:26,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3081 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:26,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:26,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-01 00:14:26,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-01 00:14:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-01 00:14:26,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:14:26,300 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 81 states. [2018-10-01 00:14:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:27,450 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2018-10-01 00:14:27,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 00:14:27,450 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-01 00:14:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:27,451 INFO L225 Difference]: With dead ends: 243 [2018-10-01 00:14:27,451 INFO L226 Difference]: Without dead ends: 161 [2018-10-01 00:14:27,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:14:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-01 00:14:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-01 00:14:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-01 00:14:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-01 00:14:27,464 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 160 [2018-10-01 00:14:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:27,464 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-01 00:14:27,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-01 00:14:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-01 00:14:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-01 00:14:27,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:27,464 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1] [2018-10-01 00:14:27,464 INFO L423 AbstractCegarLoop]: === Iteration 234 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:27,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1680595591, now seen corresponding path program 231 times [2018-10-01 00:14:27,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:27,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:27,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:27,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:27,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3081 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:29,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:29,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:29,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:14:29,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-01 00:14:29,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:29,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3081 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:30,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:30,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-01 00:14:30,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-01 00:14:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-01 00:14:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:14:30,032 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 81 states. [2018-10-01 00:14:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:30,338 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-01 00:14:30,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 00:14:30,338 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-01 00:14:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:30,339 INFO L225 Difference]: With dead ends: 165 [2018-10-01 00:14:30,339 INFO L226 Difference]: Without dead ends: 162 [2018-10-01 00:14:30,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:14:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-01 00:14:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-01 00:14:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-01 00:14:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-10-01 00:14:30,352 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 160 [2018-10-01 00:14:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:30,352 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-10-01 00:14:30,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-01 00:14:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-10-01 00:14:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-01 00:14:30,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:30,353 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1] [2018-10-01 00:14:30,353 INFO L423 AbstractCegarLoop]: === Iteration 235 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:30,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash 558794247, now seen corresponding path program 232 times [2018-10-01 00:14:30,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:30,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:30,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:30,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:30,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:33,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:33,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:33,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:14:33,475 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:14:33,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:33,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:33,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:33,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-01 00:14:33,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-01 00:14:33,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-01 00:14:33,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:14:33,550 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 81 states. [2018-10-01 00:14:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:41,451 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-10-01 00:14:41,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 00:14:41,452 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 161 [2018-10-01 00:14:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:41,452 INFO L225 Difference]: With dead ends: 245 [2018-10-01 00:14:41,453 INFO L226 Difference]: Without dead ends: 242 [2018-10-01 00:14:41,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 236 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:14:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-01 00:14:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 164. [2018-10-01 00:14:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-01 00:14:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-01 00:14:41,465 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-10-01 00:14:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:41,465 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-01 00:14:41,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-01 00:14:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-01 00:14:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-01 00:14:41,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:41,466 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1] [2018-10-01 00:14:41,466 INFO L423 AbstractCegarLoop]: === Iteration 236 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:41,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:41,466 INFO L82 PathProgramCache]: Analyzing trace with hash 142690951, now seen corresponding path program 233 times [2018-10-01 00:14:41,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:41,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:41,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:41,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:41,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:43,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:43,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:43,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:14:43,923 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2018-10-01 00:14:43,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:43,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:43,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:43,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-01 00:14:43,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:14:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:14:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:14:43,987 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 82 states. [2018-10-01 00:14:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:44,890 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2018-10-01 00:14:44,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 00:14:44,891 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-01 00:14:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:44,891 INFO L225 Difference]: With dead ends: 246 [2018-10-01 00:14:44,892 INFO L226 Difference]: Without dead ends: 163 [2018-10-01 00:14:44,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:14:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-01 00:14:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-01 00:14:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-01 00:14:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-01 00:14:44,904 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 162 [2018-10-01 00:14:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:44,904 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-01 00:14:44,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:14:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-01 00:14:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-01 00:14:44,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:44,905 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1] [2018-10-01 00:14:44,905 INFO L423 AbstractCegarLoop]: === Iteration 237 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:44,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash -964292179, now seen corresponding path program 234 times [2018-10-01 00:14:44,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:44,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:44,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:44,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:44,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:47,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:47,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:47,335 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:14:47,481 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-01 00:14:47,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:47,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:47,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:47,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-01 00:14:47,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:14:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:14:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:14:47,542 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-10-01 00:14:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:47,889 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2018-10-01 00:14:47,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 00:14:47,890 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-01 00:14:47,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:47,890 INFO L225 Difference]: With dead ends: 167 [2018-10-01 00:14:47,890 INFO L226 Difference]: Without dead ends: 164 [2018-10-01 00:14:47,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:14:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-01 00:14:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-01 00:14:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-01 00:14:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2018-10-01 00:14:47,902 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 162 [2018-10-01 00:14:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:47,903 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2018-10-01 00:14:47,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:14:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2018-10-01 00:14:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-01 00:14:47,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:47,903 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1] [2018-10-01 00:14:47,903 INFO L423 AbstractCegarLoop]: === Iteration 238 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:47,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:47,904 INFO L82 PathProgramCache]: Analyzing trace with hash 171652001, now seen corresponding path program 235 times [2018-10-01 00:14:47,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:47,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:47,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:47,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:47,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:50,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:50,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:51,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:14:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:51,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:51,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:51,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-01 00:14:51,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:14:51,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:14:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:14:51,188 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 82 states. [2018-10-01 00:14:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:59,250 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-01 00:14:59,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 00:14:59,250 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 163 [2018-10-01 00:14:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:59,251 INFO L225 Difference]: With dead ends: 248 [2018-10-01 00:14:59,251 INFO L226 Difference]: Without dead ends: 245 [2018-10-01 00:14:59,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:14:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-10-01 00:14:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 166. [2018-10-01 00:14:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-01 00:14:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-01 00:14:59,264 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 163 [2018-10-01 00:14:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:59,264 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-01 00:14:59,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:14:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-01 00:14:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-01 00:14:59,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:59,265 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1] [2018-10-01 00:14:59,265 INFO L423 AbstractCegarLoop]: === Iteration 239 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:59,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1026183213, now seen corresponding path program 236 times [2018-10-01 00:14:59,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:59,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:59,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:59,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:14:59,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3240 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:01,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:01,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:01,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:15:01,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:15:01,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:01,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3240 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:01,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:01,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-01 00:15:01,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 00:15:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 00:15:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:15:01,713 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 83 states. [2018-10-01 00:15:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:02,688 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2018-10-01 00:15:02,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 00:15:02,688 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-01 00:15:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:02,689 INFO L225 Difference]: With dead ends: 249 [2018-10-01 00:15:02,689 INFO L226 Difference]: Without dead ends: 165 [2018-10-01 00:15:02,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:15:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-01 00:15:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-01 00:15:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-01 00:15:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-01 00:15:02,702 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 164 [2018-10-01 00:15:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:02,702 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-01 00:15:02,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 00:15:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-01 00:15:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-01 00:15:02,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:02,702 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1] [2018-10-01 00:15:02,703 INFO L423 AbstractCegarLoop]: === Iteration 240 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:02,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:02,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1069444551, now seen corresponding path program 237 times [2018-10-01 00:15:02,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:02,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:02,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:02,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:02,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3240 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:05,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:05,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:05,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:15:05,315 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-01 00:15:05,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:05,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3240 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:05,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:05,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-01 00:15:05,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 00:15:05,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 00:15:05,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:15:05,377 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 83 states. [2018-10-01 00:15:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:05,673 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-01 00:15:05,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 00:15:05,673 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-01 00:15:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:05,674 INFO L225 Difference]: With dead ends: 169 [2018-10-01 00:15:05,674 INFO L226 Difference]: Without dead ends: 166 [2018-10-01 00:15:05,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:15:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-01 00:15:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-01 00:15:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-01 00:15:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-01 00:15:05,687 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 164 [2018-10-01 00:15:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:05,687 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-01 00:15:05,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 00:15:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-01 00:15:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-01 00:15:05,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:05,688 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1] [2018-10-01 00:15:05,688 INFO L423 AbstractCegarLoop]: === Iteration 241 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:05,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1207018809, now seen corresponding path program 238 times [2018-10-01 00:15:05,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:05,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:05,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:05,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:05,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:08,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:08,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:08,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:15:08,930 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:15:08,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:08,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:09,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:09,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-01 00:15:09,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 00:15:09,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 00:15:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:15:09,003 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 83 states. [2018-10-01 00:15:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:16,764 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2018-10-01 00:15:16,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 00:15:16,765 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 165 [2018-10-01 00:15:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:16,765 INFO L225 Difference]: With dead ends: 251 [2018-10-01 00:15:16,765 INFO L226 Difference]: Without dead ends: 248 [2018-10-01 00:15:16,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:15:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-01 00:15:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 168. [2018-10-01 00:15:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-01 00:15:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-01 00:15:16,778 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 165 [2018-10-01 00:15:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:16,778 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-01 00:15:16,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 00:15:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-01 00:15:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-01 00:15:16,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:16,779 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1] [2018-10-01 00:15:16,779 INFO L423 AbstractCegarLoop]: === Iteration 242 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:16,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1237061063, now seen corresponding path program 239 times [2018-10-01 00:15:16,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:16,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:16,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:16,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:16,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3321 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:19,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:19,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:19,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:15:19,313 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-01 00:15:19,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:19,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3321 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:19,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:19,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-01 00:15:19,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 00:15:19,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 00:15:19,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:15:19,389 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 84 states. [2018-10-01 00:15:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:20,606 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2018-10-01 00:15:20,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-01 00:15:20,606 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-01 00:15:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:20,607 INFO L225 Difference]: With dead ends: 252 [2018-10-01 00:15:20,607 INFO L226 Difference]: Without dead ends: 167 [2018-10-01 00:15:20,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:15:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-01 00:15:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-01 00:15:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-01 00:15:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-01 00:15:20,620 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 166 [2018-10-01 00:15:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:20,620 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-01 00:15:20,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 00:15:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-01 00:15:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-01 00:15:20,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:20,621 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1] [2018-10-01 00:15:20,621 INFO L423 AbstractCegarLoop]: === Iteration 243 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:20,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:20,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1716804755, now seen corresponding path program 240 times [2018-10-01 00:15:20,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:20,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:20,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:20,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:20,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3321 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:23,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:23,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:23,182 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:15:23,335 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-10-01 00:15:23,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:23,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3321 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:23,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:23,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-01 00:15:23,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 00:15:23,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 00:15:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:15:23,397 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-10-01 00:15:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:23,727 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2018-10-01 00:15:23,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-01 00:15:23,728 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-01 00:15:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:23,728 INFO L225 Difference]: With dead ends: 171 [2018-10-01 00:15:23,729 INFO L226 Difference]: Without dead ends: 168 [2018-10-01 00:15:23,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:15:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-01 00:15:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-01 00:15:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-01 00:15:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-10-01 00:15:23,742 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 166 [2018-10-01 00:15:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:23,742 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-10-01 00:15:23,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 00:15:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-10-01 00:15:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-01 00:15:23,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:23,743 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1] [2018-10-01 00:15:23,743 INFO L423 AbstractCegarLoop]: === Iteration 244 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:23,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:23,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1681401375, now seen corresponding path program 241 times [2018-10-01 00:15:23,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:23,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:23,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:23,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:23,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:26,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:26,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:26,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:15:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:27,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:27,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:27,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-01 00:15:27,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 00:15:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 00:15:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:15:27,164 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 84 states. [2018-10-01 00:15:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:35,142 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-01 00:15:35,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-01 00:15:35,143 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 167 [2018-10-01 00:15:35,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:35,143 INFO L225 Difference]: With dead ends: 254 [2018-10-01 00:15:35,143 INFO L226 Difference]: Without dead ends: 251 [2018-10-01 00:15:35,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:15:35,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-01 00:15:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 170. [2018-10-01 00:15:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-01 00:15:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-10-01 00:15:35,157 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 167 [2018-10-01 00:15:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:35,157 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-10-01 00:15:35,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 00:15:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-10-01 00:15:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-01 00:15:35,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:35,157 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1] [2018-10-01 00:15:35,158 INFO L423 AbstractCegarLoop]: === Iteration 245 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:35,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash -583896595, now seen corresponding path program 242 times [2018-10-01 00:15:35,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:35,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:35,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:35,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:15:35,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3403 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:37,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:37,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:37,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:15:37,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:15:37,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:37,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3403 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:37,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:37,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-01 00:15:37,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-01 00:15:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-01 00:15:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:15:37,763 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 85 states. [2018-10-01 00:15:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:38,935 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2018-10-01 00:15:38,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 00:15:38,935 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-01 00:15:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:38,936 INFO L225 Difference]: With dead ends: 255 [2018-10-01 00:15:38,936 INFO L226 Difference]: Without dead ends: 169 [2018-10-01 00:15:38,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:15:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-01 00:15:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-01 00:15:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-01 00:15:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-01 00:15:38,950 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 168 [2018-10-01 00:15:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:38,950 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-01 00:15:38,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-01 00:15:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-01 00:15:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-01 00:15:38,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:38,951 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1] [2018-10-01 00:15:38,951 INFO L423 AbstractCegarLoop]: === Iteration 246 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:38,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1959423737, now seen corresponding path program 243 times [2018-10-01 00:15:38,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:38,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:38,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:38,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:38,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3403 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:41,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:41,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:41,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:15:41,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-01 00:15:41,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:41,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3403 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:41,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:41,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-01 00:15:41,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-01 00:15:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-01 00:15:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:15:41,765 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 85 states. [2018-10-01 00:15:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:42,073 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-01 00:15:42,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 00:15:42,073 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-01 00:15:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:42,074 INFO L225 Difference]: With dead ends: 173 [2018-10-01 00:15:42,074 INFO L226 Difference]: Without dead ends: 170 [2018-10-01 00:15:42,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:15:42,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-01 00:15:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-10-01 00:15:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-01 00:15:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2018-10-01 00:15:42,087 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 168 [2018-10-01 00:15:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:42,087 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2018-10-01 00:15:42,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-01 00:15:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2018-10-01 00:15:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-01 00:15:42,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:42,087 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1] [2018-10-01 00:15:42,088 INFO L423 AbstractCegarLoop]: === Iteration 247 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:42,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:42,088 INFO L82 PathProgramCache]: Analyzing trace with hash -612655225, now seen corresponding path program 244 times [2018-10-01 00:15:42,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:42,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:42,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:42,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:42,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:45,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:45,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:45,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:15:45,487 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:15:45,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:45,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:45,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:45,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-01 00:15:45,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-01 00:15:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-01 00:15:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:15:45,565 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 85 states. [2018-10-01 00:15:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:53,741 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-10-01 00:15:53,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 00:15:53,742 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 169 [2018-10-01 00:15:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:53,742 INFO L225 Difference]: With dead ends: 257 [2018-10-01 00:15:53,743 INFO L226 Difference]: Without dead ends: 254 [2018-10-01 00:15:53,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:15:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-01 00:15:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 172. [2018-10-01 00:15:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-01 00:15:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-10-01 00:15:53,759 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 169 [2018-10-01 00:15:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:53,759 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-10-01 00:15:53,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-01 00:15:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-10-01 00:15:53,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-01 00:15:53,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:53,760 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1] [2018-10-01 00:15:53,760 INFO L423 AbstractCegarLoop]: === Iteration 248 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:53,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:53,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1812504313, now seen corresponding path program 245 times [2018-10-01 00:15:53,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:53,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:53,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:53,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:53,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:56,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:56,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:56,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:15:56,532 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-01 00:15:56,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:56,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:56,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:56,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-01 00:15:56,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 00:15:56,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 00:15:56,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:15:56,597 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 86 states. [2018-10-01 00:15:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:57,826 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2018-10-01 00:15:57,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 00:15:57,827 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-01 00:15:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:57,827 INFO L225 Difference]: With dead ends: 258 [2018-10-01 00:15:57,828 INFO L226 Difference]: Without dead ends: 171 [2018-10-01 00:15:57,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:15:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-01 00:15:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-01 00:15:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-01 00:15:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-01 00:15:57,841 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 170 [2018-10-01 00:15:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:57,841 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-01 00:15:57,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 00:15:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-01 00:15:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-01 00:15:57,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:57,842 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1] [2018-10-01 00:15:57,842 INFO L423 AbstractCegarLoop]: === Iteration 249 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:57,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:57,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1504172755, now seen corresponding path program 246 times [2018-10-01 00:15:57,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:57,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:57,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:57,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:57,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:00,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:00,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:00,484 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:16:00,637 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-01 00:16:00,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:00,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:00,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:00,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-01 00:16:00,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 00:16:00,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 00:16:00,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:16:00,700 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-10-01 00:16:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:00,994 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-10-01 00:16:00,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 00:16:00,994 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-01 00:16:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:00,995 INFO L225 Difference]: With dead ends: 175 [2018-10-01 00:16:00,995 INFO L226 Difference]: Without dead ends: 172 [2018-10-01 00:16:00,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:16:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-01 00:16:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-10-01 00:16:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-01 00:16:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-10-01 00:16:01,013 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 170 [2018-10-01 00:16:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:01,013 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-10-01 00:16:01,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 00:16:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-10-01 00:16:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-01 00:16:01,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:01,014 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1] [2018-10-01 00:16:01,014 INFO L423 AbstractCegarLoop]: === Iteration 250 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:01,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash 615223329, now seen corresponding path program 247 times [2018-10-01 00:16:01,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:01,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:01,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:01,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:01,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:04,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:04,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:04,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:16:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:04,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:04,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:04,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-01 00:16:04,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 00:16:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 00:16:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:16:04,551 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 86 states. [2018-10-01 00:16:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:12,932 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-01 00:16:12,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 00:16:12,932 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 171 [2018-10-01 00:16:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:12,933 INFO L225 Difference]: With dead ends: 260 [2018-10-01 00:16:12,933 INFO L226 Difference]: Without dead ends: 257 [2018-10-01 00:16:12,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:16:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-01 00:16:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 174. [2018-10-01 00:16:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-01 00:16:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2018-10-01 00:16:12,947 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 171 [2018-10-01 00:16:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:12,947 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2018-10-01 00:16:12,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 00:16:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2018-10-01 00:16:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-01 00:16:12,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:12,948 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1] [2018-10-01 00:16:12,948 INFO L423 AbstractCegarLoop]: === Iteration 251 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:12,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1891992493, now seen corresponding path program 248 times [2018-10-01 00:16:12,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:12,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:12,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:12,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:16:12,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3570 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:15,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:15,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:15,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:16:15,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:16:15,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:15,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3570 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:15,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:15,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-01 00:16:15,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-01 00:16:15,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-01 00:16:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:16:15,654 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 87 states. [2018-10-01 00:16:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:16,926 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2018-10-01 00:16:16,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:16:16,927 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-01 00:16:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:16,927 INFO L225 Difference]: With dead ends: 261 [2018-10-01 00:16:16,927 INFO L226 Difference]: Without dead ends: 173 [2018-10-01 00:16:16,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:16:16,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-01 00:16:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-01 00:16:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-01 00:16:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-01 00:16:16,941 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 172 [2018-10-01 00:16:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:16,941 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-01 00:16:16,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-01 00:16:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-01 00:16:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-01 00:16:16,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:16,942 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1] [2018-10-01 00:16:16,942 INFO L423 AbstractCegarLoop]: === Iteration 252 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:16,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:16,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1434631097, now seen corresponding path program 249 times [2018-10-01 00:16:16,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:16,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:16,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:16,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:16,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3570 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:19,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:19,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:19,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:16:19,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-10-01 00:16:19,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:19,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3570 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:19,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:19,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-01 00:16:19,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-01 00:16:19,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-01 00:16:19,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:16:19,838 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 87 states. [2018-10-01 00:16:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:20,191 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-01 00:16:20,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:16:20,192 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-01 00:16:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:20,192 INFO L225 Difference]: With dead ends: 177 [2018-10-01 00:16:20,192 INFO L226 Difference]: Without dead ends: 174 [2018-10-01 00:16:20,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:16:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-01 00:16:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-01 00:16:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-01 00:16:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-10-01 00:16:20,206 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 172 [2018-10-01 00:16:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:20,206 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-10-01 00:16:20,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-01 00:16:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-10-01 00:16:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-01 00:16:20,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:20,207 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1] [2018-10-01 00:16:20,207 INFO L423 AbstractCegarLoop]: === Iteration 253 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:20,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:20,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1523952569, now seen corresponding path program 250 times [2018-10-01 00:16:20,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:20,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:20,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:20,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:20,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:23,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:23,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:23,633 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:16:23,737 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:16:23,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:23,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:23,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:23,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-01 00:16:23,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-01 00:16:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-01 00:16:23,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:16:23,819 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 87 states. [2018-10-01 00:16:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:32,353 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2018-10-01 00:16:32,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:16:32,354 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 173 [2018-10-01 00:16:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:32,354 INFO L225 Difference]: With dead ends: 263 [2018-10-01 00:16:32,354 INFO L226 Difference]: Without dead ends: 260 [2018-10-01 00:16:32,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:16:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-10-01 00:16:32,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 176. [2018-10-01 00:16:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-01 00:16:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-01 00:16:32,369 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-10-01 00:16:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:32,369 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-01 00:16:32,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-01 00:16:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-01 00:16:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-01 00:16:32,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:32,369 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1] [2018-10-01 00:16:32,370 INFO L423 AbstractCegarLoop]: === Iteration 254 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:32,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2049095, now seen corresponding path program 251 times [2018-10-01 00:16:32,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:32,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:32,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:32,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:32,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3655 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:34,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:34,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:34,983 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:16:35,175 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2018-10-01 00:16:35,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:35,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3655 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:35,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:35,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-01 00:16:35,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-01 00:16:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-01 00:16:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:16:35,243 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 88 states. [2018-10-01 00:16:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:36,477 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2018-10-01 00:16:36,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 00:16:36,477 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-01 00:16:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:36,478 INFO L225 Difference]: With dead ends: 264 [2018-10-01 00:16:36,478 INFO L226 Difference]: Without dead ends: 175 [2018-10-01 00:16:36,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:16:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-01 00:16:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-01 00:16:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-01 00:16:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-01 00:16:36,495 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 174 [2018-10-01 00:16:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:36,495 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-01 00:16:36,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-01 00:16:36,495 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-01 00:16:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-01 00:16:36,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:36,496 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1] [2018-10-01 00:16:36,496 INFO L423 AbstractCegarLoop]: === Iteration 255 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:36,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash -44067091, now seen corresponding path program 252 times [2018-10-01 00:16:36,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:36,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:36,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:36,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:36,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3655 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:39,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:39,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:39,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:16:39,388 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-01 00:16:39,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:39,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3655 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:39,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:39,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-01 00:16:39,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-01 00:16:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-01 00:16:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:16:39,455 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-10-01 00:16:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:39,895 INFO L93 Difference]: Finished difference Result 179 states and 180 transitions. [2018-10-01 00:16:39,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 00:16:39,896 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-01 00:16:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:39,897 INFO L225 Difference]: With dead ends: 179 [2018-10-01 00:16:39,897 INFO L226 Difference]: Without dead ends: 176 [2018-10-01 00:16:39,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:16:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-01 00:16:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-01 00:16:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-01 00:16:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2018-10-01 00:16:39,910 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 174 [2018-10-01 00:16:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:39,910 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2018-10-01 00:16:39,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-01 00:16:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2018-10-01 00:16:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-01 00:16:39,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:39,911 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1] [2018-10-01 00:16:39,911 INFO L423 AbstractCegarLoop]: === Iteration 256 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:39,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:39,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1366141343, now seen corresponding path program 253 times [2018-10-01 00:16:39,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:39,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:39,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:39,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:39,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:43,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:43,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:43,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:16:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:43,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:43,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:43,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-01 00:16:43,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-01 00:16:43,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-01 00:16:43,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:16:43,627 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 88 states. [2018-10-01 00:16:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:52,360 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-10-01 00:16:52,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 00:16:52,363 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 175 [2018-10-01 00:16:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:52,364 INFO L225 Difference]: With dead ends: 266 [2018-10-01 00:16:52,364 INFO L226 Difference]: Without dead ends: 263 [2018-10-01 00:16:52,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:16:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-01 00:16:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 178. [2018-10-01 00:16:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-01 00:16:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-01 00:16:52,382 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 175 [2018-10-01 00:16:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:52,382 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-01 00:16:52,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-01 00:16:52,383 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-01 00:16:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-01 00:16:52,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:52,384 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1] [2018-10-01 00:16:52,384 INFO L423 AbstractCegarLoop]: === Iteration 257 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:52,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:52,384 INFO L82 PathProgramCache]: Analyzing trace with hash 599229805, now seen corresponding path program 254 times [2018-10-01 00:16:52,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:52,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:52,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:52,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:16:52,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3741 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:55,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:55,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:55,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:16:55,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:16:55,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:55,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3741 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:55,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:55,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-01 00:16:55,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:16:55,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:16:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:16:55,252 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 89 states. [2018-10-01 00:16:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:56,421 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2018-10-01 00:16:56,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:16:56,422 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-01 00:16:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:56,423 INFO L225 Difference]: With dead ends: 267 [2018-10-01 00:16:56,423 INFO L226 Difference]: Without dead ends: 177 [2018-10-01 00:16:56,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:16:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-01 00:16:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-01 00:16:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-01 00:16:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-01 00:16:56,441 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 176 [2018-10-01 00:16:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:56,441 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-01 00:16:56,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:16:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-01 00:16:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-01 00:16:56,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:56,442 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1] [2018-10-01 00:16:56,442 INFO L423 AbstractCegarLoop]: === Iteration 258 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:56,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -830371961, now seen corresponding path program 255 times [2018-10-01 00:16:56,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:56,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:56,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:56,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:56,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3741 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:59,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:59,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:59,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:16:59,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-10-01 00:16:59,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:59,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3741 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:59,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:59,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-01 00:16:59,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:16:59,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:16:59,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:16:59,531 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 89 states. [2018-10-01 00:16:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:59,928 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-01 00:16:59,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:16:59,928 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-01 00:16:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:59,928 INFO L225 Difference]: With dead ends: 181 [2018-10-01 00:16:59,928 INFO L226 Difference]: Without dead ends: 178 [2018-10-01 00:16:59,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:16:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-01 00:16:59,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-01 00:16:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-01 00:16:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-10-01 00:16:59,942 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 176 [2018-10-01 00:16:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:59,942 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-10-01 00:16:59,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:16:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-10-01 00:16:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-01 00:16:59,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:59,943 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1] [2018-10-01 00:16:59,943 INFO L423 AbstractCegarLoop]: === Iteration 259 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:59,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash 28211463, now seen corresponding path program 256 times [2018-10-01 00:16:59,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:59,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:59,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:59,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:59,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:03,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:03,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:03,552 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:17:03,660 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:17:03,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:03,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:03,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:03,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-01 00:17:03,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:17:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:17:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:17:03,749 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 89 states. [2018-10-01 00:17:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:12,678 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-10-01 00:17:12,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:17:12,678 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 177 [2018-10-01 00:17:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:12,679 INFO L225 Difference]: With dead ends: 269 [2018-10-01 00:17:12,679 INFO L226 Difference]: Without dead ends: 266 [2018-10-01 00:17:12,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:17:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-01 00:17:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 180. [2018-10-01 00:17:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-01 00:17:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-10-01 00:17:12,693 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 177 [2018-10-01 00:17:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:12,693 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-10-01 00:17:12,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:17:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-10-01 00:17:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-01 00:17:12,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:12,694 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1] [2018-10-01 00:17:12,694 INFO L423 AbstractCegarLoop]: === Iteration 260 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:12,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash 874493831, now seen corresponding path program 257 times [2018-10-01 00:17:12,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:12,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:12,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:12,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:12,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3828 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:15,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:15,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:15,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:17:15,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2018-10-01 00:17:15,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:15,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3828 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:15,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:15,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-01 00:17:15,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 00:17:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 00:17:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:17:15,682 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 90 states. [2018-10-01 00:17:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:17,061 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2018-10-01 00:17:17,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 00:17:17,061 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-01 00:17:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:17,062 INFO L225 Difference]: With dead ends: 270 [2018-10-01 00:17:17,062 INFO L226 Difference]: Without dead ends: 179 [2018-10-01 00:17:17,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:17:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-01 00:17:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-01 00:17:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-01 00:17:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-01 00:17:17,076 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 178 [2018-10-01 00:17:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:17,077 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-01 00:17:17,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 00:17:17,077 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-01 00:17:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-01 00:17:17,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:17,077 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1] [2018-10-01 00:17:17,077 INFO L423 AbstractCegarLoop]: === Iteration 261 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:17,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:17,078 INFO L82 PathProgramCache]: Analyzing trace with hash -493487955, now seen corresponding path program 258 times [2018-10-01 00:17:17,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:17,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:17,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:17,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:17,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3828 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:19,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:19,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:19,894 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:17:20,061 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2018-10-01 00:17:20,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:20,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3828 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:20,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:20,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-01 00:17:20,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 00:17:20,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 00:17:20,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:17:20,127 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-10-01 00:17:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:20,446 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2018-10-01 00:17:20,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 00:17:20,447 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-01 00:17:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:20,447 INFO L225 Difference]: With dead ends: 183 [2018-10-01 00:17:20,448 INFO L226 Difference]: Without dead ends: 180 [2018-10-01 00:17:20,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:17:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-01 00:17:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-10-01 00:17:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-01 00:17:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-10-01 00:17:20,463 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 178 [2018-10-01 00:17:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:20,463 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-10-01 00:17:20,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 00:17:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-10-01 00:17:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-01 00:17:20,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:20,463 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1] [2018-10-01 00:17:20,463 INFO L423 AbstractCegarLoop]: === Iteration 262 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:20,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1881681057, now seen corresponding path program 259 times [2018-10-01 00:17:20,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:20,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:20,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:20,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:20,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:24,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:24,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:24,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:17:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:24,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:24,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:24,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-01 00:17:24,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 00:17:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 00:17:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:17:24,300 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 90 states. [2018-10-01 00:17:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:33,479 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-10-01 00:17:33,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 00:17:33,480 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 179 [2018-10-01 00:17:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:33,480 INFO L225 Difference]: With dead ends: 272 [2018-10-01 00:17:33,480 INFO L226 Difference]: Without dead ends: 269 [2018-10-01 00:17:33,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 263 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:17:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-01 00:17:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 182. [2018-10-01 00:17:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-01 00:17:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-01 00:17:33,494 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-10-01 00:17:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:33,495 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-01 00:17:33,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 00:17:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-01 00:17:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-01 00:17:33,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:33,495 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1] [2018-10-01 00:17:33,495 INFO L423 AbstractCegarLoop]: === Iteration 263 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:33,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:33,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1797490899, now seen corresponding path program 260 times [2018-10-01 00:17:33,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:33,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:33,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:33,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:17:33,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3916 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:36,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:36,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:36,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:17:36,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:17:36,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:36,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3916 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:36,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:36,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-01 00:17:36,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-01 00:17:36,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-01 00:17:36,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:17:36,399 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 91 states. [2018-10-01 00:17:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:37,389 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2018-10-01 00:17:37,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 00:17:37,390 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-01 00:17:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:37,390 INFO L225 Difference]: With dead ends: 273 [2018-10-01 00:17:37,391 INFO L226 Difference]: Without dead ends: 181 [2018-10-01 00:17:37,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:17:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-01 00:17:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-01 00:17:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-01 00:17:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-01 00:17:37,405 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 180 [2018-10-01 00:17:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:37,405 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-01 00:17:37,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-01 00:17:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-01 00:17:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-01 00:17:37,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:37,406 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1] [2018-10-01 00:17:37,406 INFO L423 AbstractCegarLoop]: === Iteration 264 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:37,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:37,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1255253305, now seen corresponding path program 261 times [2018-10-01 00:17:37,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:37,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:37,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:37,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:37,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3916 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:40,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:40,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:40,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:17:40,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-01 00:17:40,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:40,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3916 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:40,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:40,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-01 00:17:40,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-01 00:17:40,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-01 00:17:40,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:17:40,552 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 91 states. [2018-10-01 00:17:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:40,937 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-10-01 00:17:40,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 00:17:40,937 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-01 00:17:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:40,938 INFO L225 Difference]: With dead ends: 185 [2018-10-01 00:17:40,938 INFO L226 Difference]: Without dead ends: 182 [2018-10-01 00:17:40,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:17:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-01 00:17:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-01 00:17:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-01 00:17:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-10-01 00:17:40,953 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 180 [2018-10-01 00:17:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:40,953 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-10-01 00:17:40,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-01 00:17:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-10-01 00:17:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-01 00:17:40,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:40,954 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1] [2018-10-01 00:17:40,954 INFO L423 AbstractCegarLoop]: === Iteration 265 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:40,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash -258208313, now seen corresponding path program 262 times [2018-10-01 00:17:40,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:40,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:40,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:40,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:40,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:44,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:44,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:44,662 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:17:44,772 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:17:44,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:44,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:44,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:44,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-01 00:17:44,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-01 00:17:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-01 00:17:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:17:44,855 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 91 states. [2018-10-01 00:17:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:54,192 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2018-10-01 00:17:54,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 00:17:54,192 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 181 [2018-10-01 00:17:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:54,193 INFO L225 Difference]: With dead ends: 275 [2018-10-01 00:17:54,193 INFO L226 Difference]: Without dead ends: 272 [2018-10-01 00:17:54,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:17:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-10-01 00:17:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 184. [2018-10-01 00:17:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-01 00:17:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-10-01 00:17:54,209 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 181 [2018-10-01 00:17:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:54,210 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-10-01 00:17:54,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-01 00:17:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-10-01 00:17:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-01 00:17:54,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:54,211 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1] [2018-10-01 00:17:54,211 INFO L423 AbstractCegarLoop]: === Iteration 266 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:54,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:54,211 INFO L82 PathProgramCache]: Analyzing trace with hash 585415367, now seen corresponding path program 263 times [2018-10-01 00:17:54,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:54,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:54,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:54,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:54,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 4005 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:57,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:57,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:57,024 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:17:57,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-01 00:17:57,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:57,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 4005 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:57,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:57,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-01 00:17:57,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-01 00:17:57,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-01 00:17:57,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:17:57,300 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 92 states. [2018-10-01 00:17:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:58,209 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2018-10-01 00:17:58,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-01 00:17:58,210 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-01 00:17:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:58,210 INFO L225 Difference]: With dead ends: 276 [2018-10-01 00:17:58,211 INFO L226 Difference]: Without dead ends: 183 [2018-10-01 00:17:58,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:17:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-01 00:17:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-01 00:17:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-01 00:17:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-01 00:17:58,224 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 182 [2018-10-01 00:17:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:58,225 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-01 00:17:58,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-01 00:17:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-01 00:17:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-01 00:17:58,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:58,225 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1] [2018-10-01 00:17:58,225 INFO L423 AbstractCegarLoop]: === Iteration 267 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:58,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:58,226 INFO L82 PathProgramCache]: Analyzing trace with hash 214911597, now seen corresponding path program 264 times [2018-10-01 00:17:58,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:58,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:58,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:58,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:58,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:18:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 4005 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:18:01,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:18:01,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:18:01,157 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:18:01,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-01 00:18:01,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:18:01,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:18:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 4005 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:18:01,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:18:01,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-01 00:18:01,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-01 00:18:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-01 00:18:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:18:01,403 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-10-01 00:18:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:18:01,786 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-10-01 00:18:01,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-01 00:18:01,786 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-01 00:18:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:18:01,787 INFO L225 Difference]: With dead ends: 187 [2018-10-01 00:18:01,787 INFO L226 Difference]: Without dead ends: 184 [2018-10-01 00:18:01,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:18:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-01 00:18:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-10-01 00:18:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-01 00:18:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-10-01 00:18:01,801 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 182 [2018-10-01 00:18:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:18:01,801 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-10-01 00:18:01,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-01 00:18:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-10-01 00:18:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-01 00:18:01,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:18:01,802 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1] [2018-10-01 00:18:01,802 INFO L423 AbstractCegarLoop]: === Iteration 268 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:18:01,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:18:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1927736607, now seen corresponding path program 265 times [2018-10-01 00:18:01,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:18:01,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:18:01,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:18:01,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:18:01,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:18:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:18:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:18:05,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:18:05,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:18:05,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:18:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:18:05,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:18:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:18:05,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:18:05,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-01 00:18:05,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-01 00:18:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-01 00:18:05,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:18:05,792 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 92 states. Received shutdown request... [2018-10-01 00:18:13,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-01 00:18:13,228 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:18:13,235 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:18:13,235 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:18:13 BoogieIcfgContainer [2018-10-01 00:18:13,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:18:13,236 INFO L168 Benchmark]: Toolchain (without parser) took 762438.04 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -216.0 MB). Free memory was 1.5 GB in the beginning and 850.4 MB in the end (delta: 617.9 MB). Peak memory consumption was 401.9 MB. Max. memory is 7.1 GB. [2018-10-01 00:18:13,237 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:18:13,238 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:18:13,238 INFO L168 Benchmark]: Boogie Preprocessor took 25.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:18:13,238 INFO L168 Benchmark]: RCFGBuilder took 367.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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. [2018-10-01 00:18:13,238 INFO L168 Benchmark]: TraceAbstraction took 761994.68 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -216.0 MB). Free memory was 1.4 GB in the beginning and 850.4 MB in the end (delta: 596.8 MB). Peak memory consumption was 380.8 MB. Max. memory is 7.1 GB. [2018-10-01 00:18:13,240 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 367.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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 761994.68 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -216.0 MB). Free memory was 1.4 GB in the beginning and 850.4 MB in the end (delta: 596.8 MB). Peak memory consumption was 380.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (184states) and FLOYD_HOARE automaton (currently 92 states, 92 states before enhancement), while ReachableStatesComputation was computing reachable states (193 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (184states) and FLOYD_HOARE automaton (currently 92 states, 92 states before enhancement), while ReachableStatesComputation was computing reachable states (193 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 761.9s OverallTime, 268 OverallIterations, 89 TraceHistogramMax, 382.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1073 SDtfs, 2685 SDslu, 14479 SDs, 0 SdLazy, 581626 SolverSat, 4627 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 309.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49206 GetRequests, 36746 SyntacticMatches, 178 SemanticMatches, 12282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7832 ImplicationChecksByTransitivity, 321.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=265, 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: 1.9s AutomataMinimizationTime, 267 MinimizatonAttempts, 3916 StatesRemovedByMinimization, 88 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.5s SsaConstructionTime, 26.7s SatisfiabilityAnalysisTime, 335.3s InterpolantComputationTime, 50365 NumberOfCodeBlocks, 50365 NumberOfCodeBlocksAsserted, 3635 NumberOfCheckSat, 49832 ConstructedInterpolants, 0 QuantifiedInterpolants, 26262716 SizeOfPredicates, 176 NumberOfNonLiveVariables, 110505 ConjunctsInSsa, 32479 ConjunctsInUnsatCore, 533 InterpolantComputations, 3 PerfectInterpolantSequences, 485937/1441797 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-18-13-249.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-18-13-249.csv Completed graceful shutdown