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/LuxembourgOctopus.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:50:10,489 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:50:10,492 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:50:10,507 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:50:10,508 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:50:10,509 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:50:10,510 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:50:10,512 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:50:10,513 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:50:10,514 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:50:10,515 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:50:10,553 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:50:10,576 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:50:10,576 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:50:10,577 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:50:10,577 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:50:10,578 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:50:10,578 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:50:10,579 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:50:10,579 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:50:10,579 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:50:10,579 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:50:10,580 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:50:10,581 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:50:10,581 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:50:10,581 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:50:10,581 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:50:10,581 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:50:10,582 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:50:10,582 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:50:10,582 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:50:10,583 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:50:10,584 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:50:10,584 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:50:10,584 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:50:10,584 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:50:10,584 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:50:10,585 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:50:10,585 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:50:10,585 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:50:10,585 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:50:10,585 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:50:10,647 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:50:10,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:50:10,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:50:10,666 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:50:10,666 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:50:10,667 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl [2018-09-23 19:50:10,668 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl' [2018-09-23 19:50:10,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:50:10,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:50:10,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:50:10,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:50:10,719 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:50:10,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,759 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:50:10,760 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:50:10,760 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:50:10,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:50:10,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:50:10,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:50:10,763 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:50:10,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... [2018-09-23 19:50:10,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:50:10,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:50:10,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:50:10,788 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:50:10,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:50:10,873 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 19:50:10,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 19:50:10,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 19:50:11,010 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:50:11,011 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:50:11 BoogieIcfgContainer [2018-09-23 19:50:11,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:50:11,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:50:11,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:50:11,017 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:50:11,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:10" (1/2) ... [2018-09-23 19:50:11,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd06af5 and model type LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:50:11, skipping insertion in model container [2018-09-23 19:50:11,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:50:11" (2/2) ... [2018-09-23 19:50:11,026 INFO L112 eAbstractionObserver]: Analyzing ICFG LuxembourgOctopus.bpl [2018-09-23 19:50:11,036 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:50:11,048 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:50:11,099 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:50:11,100 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:50:11,100 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:50:11,101 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:50:11,101 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:50:11,101 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:50:11,101 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:50:11,101 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:50:11,101 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:50:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 19:50:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:50:11,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:11,124 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:50:11,125 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:11,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-23 19:50:11,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:11,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:11,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:11,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,264 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:50:11,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:50:11,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:50:11,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:50:11,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:50:11,282 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 19:50:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:11,334 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-23 19:50:11,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:50:11,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:50:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:11,362 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:50:11,363 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 19:50:11,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:50:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 19:50:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 19:50:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 19:50:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 19:50:11,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 19:50:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:11,434 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 19:50:11,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:50:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 19:50:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:50:11,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:11,439 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:50:11,440 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:11,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-23 19:50:11,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:11,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:11,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:11,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:11,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:11,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:11,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:11,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-23 19:50:11,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:50:11,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:50:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:50:11,734 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-23 19:50:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:11,838 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 19:50:11,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:50:11,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-23 19:50:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:11,840 INFO L225 Difference]: With dead ends: 8 [2018-09-23 19:50:11,840 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:50:11,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:50:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:50:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:50:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:50:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:50:11,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 19:50:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:11,849 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:50:11,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:50:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:50:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:50:11,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:11,852 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 19:50:11,852 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:11,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-23 19:50:11,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:11,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:11,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:11,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:11,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 19:50:11,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:11,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:11,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:11,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:12,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-09-23 19:50:12,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:50:12,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:50:12,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:50:12,060 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-23 19:50:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,099 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:50:12,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:50:12,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 19:50:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,100 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:50:12,100 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:50:12,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:50:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:50:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:50:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:50:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:50:12,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 19:50:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:12,104 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:50:12,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:50:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:50:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:50:12,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:12,105 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-23 19:50:12,105 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:12,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:12,106 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-23 19:50:12,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:12,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:12,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:12,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:12,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:12,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:12,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:50:12,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:12,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:12,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-23 19:50:12,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:50:12,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:50:12,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:50:12,383 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-23 19:50:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,507 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 19:50:12,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:50:12,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-23 19:50:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,509 INFO L225 Difference]: With dead ends: 10 [2018-09-23 19:50:12,509 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:50:12,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:50:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:50:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:50:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:50:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:50:12,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 19:50:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:12,513 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:50:12,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:50:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:50:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:50:12,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:12,515 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-23 19:50:12,515 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:12,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-23 19:50:12,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:12,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:12,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:12,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:12,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:12,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:12,689 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:12,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:12,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:12,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-09-23 19:50:12,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:50:12,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:50:12,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:50:12,738 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-23 19:50:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,778 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:50:12,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:50:12,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-23 19:50:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,780 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:50:12,780 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:50:12,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:50:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:50:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:50:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:50:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:50:12,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 19:50:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:12,784 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:50:12,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:50:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:50:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:50:12,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:12,785 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-23 19:50:12,785 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:12,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:12,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-23 19:50:12,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:12,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:12,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:12,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:12,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:12,984 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:12,997 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:50:12,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:12,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:13,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-23 19:50:13,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:13,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:13,075 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-23 19:50:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:13,110 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 19:50:13,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:50:13,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-23 19:50:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:13,112 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:50:13,112 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:50:13,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:50:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:50:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:50:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:50:13,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 19:50:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:13,117 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:50:13,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:50:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:50:13,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:13,118 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-23 19:50:13,118 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:13,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-23 19:50:13,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:13,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:13,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:13,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:13,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:13,249 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:13,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:50:13,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:13,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:13,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-09-23 19:50:13,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:13,332 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-23 19:50:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:13,367 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:50:13,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:13,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-23 19:50:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:13,369 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:50:13,369 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:50:13,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:13,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:50:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:50:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:50:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:50:13,375 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 19:50:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:13,375 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:50:13,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:50:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:50:13,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:13,376 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-23 19:50:13,377 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:13,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-23 19:50:13,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:13,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:13,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:13,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:13,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:13,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:13,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:13,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-23 19:50:13,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:50:13,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:50:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:50:13,945 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-23 19:50:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:13,991 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 19:50:13,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:13,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-23 19:50:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:13,995 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:50:13,995 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:50:13,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:50:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:50:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:50:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:50:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:50:13,998 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 19:50:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:13,999 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:50:13,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:50:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:50:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:50:13,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,000 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-23 19:50:14,000 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-23 19:50:14,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:14,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:14,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:14,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:14,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:14,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:14,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-09-23 19:50:14,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:50:14,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:50:14,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:50:14,225 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-23 19:50:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,280 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:50:14,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:50:14,281 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-23 19:50:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,282 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:50:14,282 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:50:14,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:50:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:50:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:50:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:50:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:50:14,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 19:50:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:50:14,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:50:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:50:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:50:14,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,286 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-23 19:50:14,287 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-23 19:50:14,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:14,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:14,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:14,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:50:14,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:14,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:14,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-23 19:50:14,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:50:14,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:50:14,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:50:14,550 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-23 19:50:14,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,595 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 19:50:14,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:50:14,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-23 19:50:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,597 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:50:14,597 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:50:14,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:50:14,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:50:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:50:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:50:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:50:14,602 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 19:50:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,602 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:50:14,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:50:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:50:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:50:14,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,603 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-23 19:50:14,603 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-23 19:50:14,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:14,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:14,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:14,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:14,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:14,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:14,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-09-23 19:50:14,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:50:14,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:50:14,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:50:14,921 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-23 19:50:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,956 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:50:14,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:50:14,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:50:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,957 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:50:14,957 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:50:14,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:50:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:50:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:50:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:50:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:50:14,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 19:50:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,963 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:50:14,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:50:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:50:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:50:14,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,964 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-23 19:50:14,964 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-23 19:50:14,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:14,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:15,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:15,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:15,279 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:50:15,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:15,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:15,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-23 19:50:15,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:50:15,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:50:15,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:50:15,318 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-23 19:50:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:15,374 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 19:50:15,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:50:15,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-23 19:50:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:15,375 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:50:15,375 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:50:15,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:50:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:50:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:50:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:50:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:50:15,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 19:50:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:15,379 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:50:15,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:50:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:50:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:15,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:15,380 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-23 19:50:15,380 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:15,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:15,381 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-23 19:50:15,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:15,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:15,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:15,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:15,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:15,579 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:15,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:50:15,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:15,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:15,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-09-23 19:50:15,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:50:15,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:50:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:50:15,639 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-23 19:50:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:15,699 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:50:15,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:50:15,700 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 19:50:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:15,700 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:50:15,700 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:50:15,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:50:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:50:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:50:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:50:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:50:15,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 19:50:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:15,705 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:50:15,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:50:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:50:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:50:15,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:15,706 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-23 19:50:15,706 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:15,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:15,707 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-23 19:50:15,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:15,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:15,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:15,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:15,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:15,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:15,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:15,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-23 19:50:15,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:50:15,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:50:15,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:50:15,998 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-23 19:50:16,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:16,287 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 19:50:16,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:50:16,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-23 19:50:16,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:16,288 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:50:16,289 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:50:16,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:50:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:50:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:50:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:50:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:50:16,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 19:50:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:16,293 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:50:16,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:50:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:50:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:16,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:16,294 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-23 19:50:16,294 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:16,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:16,295 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-23 19:50:16,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:16,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:16,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:16,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:16,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:16,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:16,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:16,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:16,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:16,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-09-23 19:50:16,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:50:16,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:50:16,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:50:16,692 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-23 19:50:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:16,779 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:50:16,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:50:16,782 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-23 19:50:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:16,783 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:50:16,783 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:50:16,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:50:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:50:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:50:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:50:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:50:16,787 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 19:50:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:16,788 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:50:16,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:50:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:50:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:50:16,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:16,789 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-23 19:50:16,789 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:16,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-23 19:50:16,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:16,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:16,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:16,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:17,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:17,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:17,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:50:17,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:17,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:17,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-23 19:50:17,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:50:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:50:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:50:17,378 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-23 19:50:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:17,721 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 19:50:17,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:50:17,722 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-23 19:50:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:17,723 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:50:17,723 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:50:17,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:50:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:50:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:50:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:50:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:50:17,727 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 19:50:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:17,727 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:50:17,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:50:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:50:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:50:17,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:17,728 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-23 19:50:17,728 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:17,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-23 19:50:17,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:17,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:17,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:17,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:18,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:18,279 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:18,298 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:18,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:18,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:18,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-09-23 19:50:18,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:50:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:50:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:50:18,346 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-23 19:50:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:18,420 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:50:18,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:50:18,421 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-23 19:50:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:18,422 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:50:18,422 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:50:18,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:50:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:50:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:50:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:50:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:50:18,428 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 19:50:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:18,429 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:50:18,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:50:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:50:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:50:18,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:18,430 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-23 19:50:18,430 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:18,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-23 19:50:18,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:18,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:18,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:18,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:18,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:18,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:18,940 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:19,014 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:50:19,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:19,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:19,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-23 19:50:19,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:50:19,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:50:19,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:50:19,136 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-23 19:50:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:19,188 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 19:50:19,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:50:19,190 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-23 19:50:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:19,190 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:50:19,191 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:50:19,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:50:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:50:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:50:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:50:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:50:19,196 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 19:50:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:19,196 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:50:19,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:50:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:50:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:50:19,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:19,197 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-23 19:50:19,197 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:19,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-23 19:50:19,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:19,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:19,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:19,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:19,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:19,853 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:19,867 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:50:19,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:19,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:19,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-09-23 19:50:19,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:50:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:50:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:50:19,920 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-23 19:50:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:20,109 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:50:20,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:50:20,109 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-23 19:50:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:20,110 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:50:20,110 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:50:20,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:50:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:50:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:50:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:50:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:50:20,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 19:50:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:20,115 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:50:20,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:50:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:50:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:50:20,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:20,116 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-23 19:50:20,116 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:20,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:20,117 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-23 19:50:20,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:20,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:20,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:20,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:20,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:20,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:20,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:20,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-23 19:50:20,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:50:20,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:50:20,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:50:20,470 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-23 19:50:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:20,505 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 19:50:20,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:50:20,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-23 19:50:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:20,507 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:50:20,507 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:50:20,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:50:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:50:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:50:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:50:20,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 19:50:20,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:20,512 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:50:20,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:50:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:50:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:50:20,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:20,513 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-23 19:50:20,514 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:20,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-23 19:50:20,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:20,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:20,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:20,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:20,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:20,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:20,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:20,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:20,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:20,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-09-23 19:50:20,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:50:20,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:50:20,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:50:20,937 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-23 19:50:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:21,036 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:50:21,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:50:21,037 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-23 19:50:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:21,038 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:50:21,038 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:50:21,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:50:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:50:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:50:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:50:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:50:21,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 19:50:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:21,042 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:50:21,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:50:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:50:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:50:21,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:21,043 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-23 19:50:21,044 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:21,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-23 19:50:21,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:21,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:21,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:21,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:21,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:21,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:21,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:21,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:50:21,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:21,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:21,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:21,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-23 19:50:21,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:50:21,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:50:21,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:50:21,489 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-23 19:50:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:21,576 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 19:50:21,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:50:21,578 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-23 19:50:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:21,578 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:50:21,579 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:50:21,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:50:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:50:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:50:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:50:21,583 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 19:50:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:21,584 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:50:21,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:50:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:50:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:50:21,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:21,584 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-23 19:50:21,585 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:21,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-23 19:50:21,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:21,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:21,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:21,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:22,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:22,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:22,430 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:22,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:22,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:22,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:22,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:22,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-09-23 19:50:22,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:50:22,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:50:22,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:50:22,498 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-23 19:50:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:22,635 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:50:22,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:50:22,636 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-23 19:50:22,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:22,636 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:50:22,637 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:50:22,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:50:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:50:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:50:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:50:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:50:22,643 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 19:50:22,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:22,643 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:50:22,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:50:22,643 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:50:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:50:22,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:22,644 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-23 19:50:22,644 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:22,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-23 19:50:22,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:22,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:22,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:22,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:22,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:23,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:23,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:23,263 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:50:23,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:23,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:23,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-23 19:50:23,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:50:23,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:50:23,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:50:23,308 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-23 19:50:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:23,418 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 19:50:23,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:50:23,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-23 19:50:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:23,419 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:50:23,419 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:50:23,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:50:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:50:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:50:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:50:23,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 19:50:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:23,425 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:50:23,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:50:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:50:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:50:23,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:23,426 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-23 19:50:23,426 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:23,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:23,427 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-23 19:50:23,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:23,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:23,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:23,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:24,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:24,122 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:24,140 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:50:24,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:24,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:24,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-09-23 19:50:24,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:50:24,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:50:24,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:50:24,194 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-23 19:50:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:24,255 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:50:24,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:50:24,256 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-23 19:50:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:24,256 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:50:24,257 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:50:24,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:50:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:50:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:50:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:50:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:50:24,261 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 19:50:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:24,262 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:50:24,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:50:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:50:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:50:24,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:24,263 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-23 19:50:24,263 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:24,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-23 19:50:24,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:24,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:24,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:24,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:25,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:25,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:25,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-23 19:50:25,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:50:25,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:50:25,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:50:25,096 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-23 19:50:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:25,310 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 19:50:25,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:50:25,311 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-23 19:50:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:25,312 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:50:25,312 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:50:25,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:50:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:50:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:50:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:50:25,315 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 19:50:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:25,315 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:50:25,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:50:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:50:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:50:25,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:25,316 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-23 19:50:25,316 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:25,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:25,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-23 19:50:25,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:25,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:25,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:25,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:26,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:26,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:26,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:26,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:26,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:26,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-09-23 19:50:26,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:50:26,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:50:26,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:50:26,242 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-23 19:50:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:26,309 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:50:26,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:50:26,309 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-23 19:50:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:26,310 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:50:26,310 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:50:26,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:50:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:50:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:50:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:50:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:50:26,315 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 19:50:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:26,315 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:50:26,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:50:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:50:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:50:26,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:26,316 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-23 19:50:26,316 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:26,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-23 19:50:26,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:26,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:26,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:26,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:26,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:26,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:26,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:50:26,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:26,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:26,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-23 19:50:26,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:50:26,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:50:26,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:50:26,854 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-23 19:50:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:26,958 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 19:50:26,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:50:26,958 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-23 19:50:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:26,959 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:50:26,959 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:50:26,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:50:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:50:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:50:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:50:26,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 19:50:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:26,963 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:50:26,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:50:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:50:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:50:26,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:26,964 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-23 19:50:26,964 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:26,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-23 19:50:26,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:26,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:26,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:26,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:27,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:27,567 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:27,588 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:27,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:27,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:27,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-09-23 19:50:27,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:50:27,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:50:27,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:50:27,624 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-23 19:50:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:27,803 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:50:27,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:50:27,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-23 19:50:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:27,804 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:50:27,804 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:50:27,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:50:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:50:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:50:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:50:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:50:27,808 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 19:50:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:27,808 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:50:27,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:50:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:50:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:50:27,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:27,809 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-23 19:50:27,809 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:27,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:27,810 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-23 19:50:27,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:27,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:27,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:27,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:28,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:28,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:28,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:50:28,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:28,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:28,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-23 19:50:28,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:50:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:50:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:50:28,600 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-23 19:50:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:28,703 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 19:50:28,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:50:28,704 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-23 19:50:28,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:28,705 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:50:28,705 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:50:28,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:50:28,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:50:28,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:50:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:50:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:50:28,709 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 19:50:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:28,709 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:50:28,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:50:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:50:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:50:28,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:28,710 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-23 19:50:28,711 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:28,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-23 19:50:28,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:28,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:28,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:28,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:29,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:29,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:29,333 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:50:29,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:29,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:29,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-09-23 19:50:29,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:50:29,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:50:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:50:29,440 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-23 19:50:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:29,523 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:50:29,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:50:29,524 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-23 19:50:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:29,525 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:29,525 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:50:29,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:50:29,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:50:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:50:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:50:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:50:29,529 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 19:50:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:29,529 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:50:29,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:50:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:50:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:50:29,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:29,530 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-23 19:50:29,530 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:29,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:29,531 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-23 19:50:29,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:29,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:29,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:29,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:30,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:30,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:30,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:30,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-23 19:50:30,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:50:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:50:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:50:30,158 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-23 19:50:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:30,244 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 19:50:30,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:50:30,245 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-23 19:50:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:30,246 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:50:30,246 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:50:30,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:50:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:50:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:50:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:50:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:50:30,253 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 19:50:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:30,253 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:50:30,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:50:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:50:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:50:30,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:30,254 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-23 19:50:30,254 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:30,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-23 19:50:30,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:30,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:30,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:30,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:31,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:31,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:31,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:31,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:31,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:31,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:31,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:31,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-09-23 19:50:31,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:50:31,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:50:31,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:50:31,126 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-23 19:50:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:31,185 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:50:31,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:50:31,185 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-23 19:50:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:31,186 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:31,186 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:31,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:50:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:50:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:50:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:50:31,190 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 19:50:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:31,190 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:50:31,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:50:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:50:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:50:31,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:31,191 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-23 19:50:31,191 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:31,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-23 19:50:31,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:31,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:31,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:31,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:32,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:32,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:32,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:50:32,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:32,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:32,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-23 19:50:32,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:50:32,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:50:32,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:50:32,697 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-23 19:50:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:32,740 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 19:50:32,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:50:32,740 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-23 19:50:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:32,741 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:50:32,741 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:50:32,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:50:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:50:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:50:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:50:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:50:32,745 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 19:50:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:32,746 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:50:32,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:50:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:50:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:50:32,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:32,746 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-23 19:50:32,747 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:32,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-23 19:50:32,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:32,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:32,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:32,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:32,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:33,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:33,450 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:33,473 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:33,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:33,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:33,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-09-23 19:50:33,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:50:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:50:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:50:33,526 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-23 19:50:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:34,404 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:50:34,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:50:34,405 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-23 19:50:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:34,405 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:34,405 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:34,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:50:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:50:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:50:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:50:34,409 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 19:50:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:34,410 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:50:34,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:50:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:50:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:50:34,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:34,411 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-23 19:50:34,411 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:34,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:34,411 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-23 19:50:34,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:34,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:34,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:34,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:35,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:35,651 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:35,679 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:50:35,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:35,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:35,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-23 19:50:35,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:50:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:50:35,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:50:35,723 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-23 19:50:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:35,800 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 19:50:35,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:50:35,801 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-23 19:50:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:35,802 INFO L225 Difference]: With dead ends: 42 [2018-09-23 19:50:35,802 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:50:35,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:50:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:50:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:50:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:50:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:50:35,806 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 19:50:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:35,806 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:50:35,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:50:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:50:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:50:35,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:35,806 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-23 19:50:35,807 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:35,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:35,807 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-23 19:50:35,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:35,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:35,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:35,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:36,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:36,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:36,508 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:36,540 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:50:36,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:36,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:36,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:36,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-09-23 19:50:36,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:50:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:50:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:50:36,579 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-23 19:50:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:36,625 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:50:36,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:50:36,626 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-23 19:50:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:36,626 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:36,627 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:36,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:50:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:50:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:50:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:50:36,629 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 19:50:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:36,630 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:50:36,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:50:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:50:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:50:36,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:36,630 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-23 19:50:36,631 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:36,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-23 19:50:36,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:36,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:36,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:36,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:36,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:37,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:37,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:37,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:37,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-23 19:50:37,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:50:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:50:37,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:50:37,669 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-23 19:50:37,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:37,734 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 19:50:37,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:50:37,734 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-23 19:50:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:37,735 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:50:37,735 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:50:37,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:50:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:50:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:50:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:50:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:50:37,738 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 19:50:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:37,739 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:50:37,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:50:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:50:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:50:37,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:37,739 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-23 19:50:37,740 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:37,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:37,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-23 19:50:37,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:37,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:37,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:37,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:38,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:38,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:38,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:38,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:38,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:38,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:38,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:38,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-09-23 19:50:38,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:50:38,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:50:38,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:50:38,586 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-23 19:50:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:38,653 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:50:38,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:50:38,654 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-23 19:50:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:38,654 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:38,654 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:38,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:50:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:50:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:50:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:50:38,658 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 19:50:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:38,658 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:50:38,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:50:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:50:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:50:38,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:38,659 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-23 19:50:38,659 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:38,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:38,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-23 19:50:38,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:38,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:38,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:38,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:39,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:39,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:39,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:50:39,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:39,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:39,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-23 19:50:39,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:50:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:50:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:50:39,597 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-23 19:50:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:39,671 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 19:50:39,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:50:39,671 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-23 19:50:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:39,672 INFO L225 Difference]: With dead ends: 46 [2018-09-23 19:50:39,672 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:50:39,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:50:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:50:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:50:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:50:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:50:39,675 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 19:50:39,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:39,676 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:50:39,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:50:39,676 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:50:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:50:39,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:39,676 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-23 19:50:39,677 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:39,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-23 19:50:39,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:39,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:39,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:39,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:40,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:40,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:40,415 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:40,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:40,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:40,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:40,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:40,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-09-23 19:50:40,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:50:40,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:50:40,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:50:40,485 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-23 19:50:40,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:40,580 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:50:40,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:50:40,581 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-23 19:50:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:40,581 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:40,582 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:40,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:50:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:40,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:50:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:50:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:50:40,585 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 19:50:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:40,585 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:50:40,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:50:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:50:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:50:40,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:40,586 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-23 19:50:40,586 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:40,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-23 19:50:40,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:40,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:40,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:40,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:40,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:41,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:41,896 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:41,928 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:50:41,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:41,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:41,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-23 19:50:41,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:50:41,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:50:41,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:50:41,968 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-23 19:50:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:42,042 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 19:50:42,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:50:42,043 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-23 19:50:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:42,044 INFO L225 Difference]: With dead ends: 48 [2018-09-23 19:50:42,044 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:50:42,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:50:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:50:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:50:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:50:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:50:42,047 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 19:50:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:42,047 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:50:42,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:50:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:50:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:50:42,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:42,048 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-23 19:50:42,048 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:42,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:42,048 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-23 19:50:42,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:42,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:42,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:42,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:42,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:43,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:43,225 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:43,270 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:50:43,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:43,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:43,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-09-23 19:50:43,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:50:43,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:50:43,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:50:43,322 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-23 19:50:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:43,391 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:50:43,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:50:43,391 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-23 19:50:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:43,392 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:43,392 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:43,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:50:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:50:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:50:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:50:43,396 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 19:50:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:43,396 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:50:43,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:50:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:50:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:50:43,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:43,397 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-23 19:50:43,397 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:43,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-23 19:50:43,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:43,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:43,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:43,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:44,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:44,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:44,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:44,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-23 19:50:44,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:50:44,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:50:44,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:50:44,549 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-23 19:50:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:44,674 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 19:50:44,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:50:44,675 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-23 19:50:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:44,675 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:50:44,675 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:50:44,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:50:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:50:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:50:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:50:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 19:50:44,679 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 19:50:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:44,680 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 19:50:44,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:50:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 19:50:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:50:44,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:44,680 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-23 19:50:44,681 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:44,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-23 19:50:44,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:44,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:44,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:44,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:45,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:45,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:45,687 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:45,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:45,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:45,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-09-23 19:50:45,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:50:45,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:50:45,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:50:45,731 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-23 19:50:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:45,813 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:50:45,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:50:45,814 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-23 19:50:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:45,815 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:45,815 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:45,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:50:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:50:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:50:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:50:45,819 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 19:50:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:45,820 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:50:45,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:50:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:50:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:50:45,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:45,820 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-23 19:50:45,821 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:45,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-23 19:50:45,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:45,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:45,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:45,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:46,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:46,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:46,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:50:46,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:46,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:46,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-23 19:50:46,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:50:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:50:46,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:50:46,976 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-23 19:50:47,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:47,552 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 19:50:47,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:50:47,552 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-23 19:50:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:47,552 INFO L225 Difference]: With dead ends: 52 [2018-09-23 19:50:47,552 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:50:47,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:50:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:50:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:50:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:50:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 19:50:47,555 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 19:50:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:47,555 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 19:50:47,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:50:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 19:50:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:50:47,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:47,555 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-23 19:50:47,555 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:47,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:47,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-23 19:50:47,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:47,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:47,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:47,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:47,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:48,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:48,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:48,718 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:48,745 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:48,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:48,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:48,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:48,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-09-23 19:50:48,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:50:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:50:48,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:50:48,801 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-23 19:50:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:49,081 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:50:49,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:50:49,081 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-23 19:50:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:49,082 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:50:49,082 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:50:49,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:50:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:50:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:50:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:50:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:50:49,084 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 19:50:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:49,085 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:50:49,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:50:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:50:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:50:49,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:49,085 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-23 19:50:49,085 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:49,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-23 19:50:49,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:49,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:49,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:49,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:49,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:50,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:50,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:50,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:50:50,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:50,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:50,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-23 19:50:50,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:50:50,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:50:50,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:50:50,241 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-23 19:50:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:50,325 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 19:50:50,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:50:50,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-23 19:50:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:50,334 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:50:50,334 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:50:50,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:50:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:50:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:50:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:50:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 19:50:50,338 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 19:50:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:50,338 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 19:50:50,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:50:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 19:50:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:50:50,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:50,339 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-23 19:50:50,341 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:50,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-23 19:50:50,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:50,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:50,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:50,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:50,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:51,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:51,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:51,480 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:51,517 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:50:51,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:51,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:51,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:51,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-09-23 19:50:51,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:50:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:50:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:50:51,556 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-23 19:50:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:51,642 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:50:51,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:50:51,642 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-23 19:50:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:51,643 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:51,643 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:51,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:50:51,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:50:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:50:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:50:51,647 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 19:50:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:51,648 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:50:51,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:50:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:50:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:50:51,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:51,648 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-23 19:50:51,649 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:51,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-23 19:50:51,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:51,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:51,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:51,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:51,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:53,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:53,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:53,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:53,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-23 19:50:53,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:50:53,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:50:53,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:50:53,723 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-23 19:50:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:53,815 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 19:50:53,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:50:53,816 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-23 19:50:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:53,817 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:50:53,817 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:50:53,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:50:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:50:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:50:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:50:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 19:50:53,820 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 19:50:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:53,820 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 19:50:53,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:50:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 19:50:53,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:50:53,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:53,821 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-23 19:50:53,821 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:53,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:53,822 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-23 19:50:53,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:53,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:53,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:53,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:55,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:55,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:55,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:55,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:55,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:55,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:55,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:55,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-09-23 19:50:55,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:50:55,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:50:55,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:50:55,282 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-23 19:50:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:55,416 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:50:55,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:50:55,417 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-23 19:50:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:55,418 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:50:55,418 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:50:55,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:50:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:50:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:50:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:50:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:50:55,422 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 19:50:55,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:55,422 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:50:55,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:50:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:50:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:50:55,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:55,423 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-23 19:50:55,423 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:55,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-23 19:50:55,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:55,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:55,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:55,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:55,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:56,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:56,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:56,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:56,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:50:56,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:56,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:56,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:56,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-23 19:50:56,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:50:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:50:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:50:56,821 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-23 19:50:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:56,920 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 19:50:56,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:50:56,920 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-23 19:50:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:56,921 INFO L225 Difference]: With dead ends: 58 [2018-09-23 19:50:56,921 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:50:56,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:50:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:50:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:50:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:50:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 19:50:56,926 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 19:50:56,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:56,926 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 19:50:56,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:50:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 19:50:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:50:56,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:56,927 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-23 19:50:56,927 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:56,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:56,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-23 19:50:56,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:56,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:56,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:56,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:56,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:58,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:58,439 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:58,472 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:58,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:58,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:58,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-09-23 19:50:58,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:50:58,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:50:58,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:58,523 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-23 19:50:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:58,634 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:50:58,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:50:58,634 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-23 19:50:58,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:58,635 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:58,635 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:58,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:58,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:50:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:50:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:50:58,639 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 19:50:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:58,640 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:50:58,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:50:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:50:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:50:58,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:58,641 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-23 19:50:58,641 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:58,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:58,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-23 19:50:58,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:58,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:58,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:58,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:59,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:59,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:59,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:00,040 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:51:00,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:00,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:00,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-23 19:51:00,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:51:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:51:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:51:00,083 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-23 19:51:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:00,228 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 19:51:00,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:51:00,229 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-23 19:51:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:00,230 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:51:00,230 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:51:00,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:51:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:51:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:51:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:51:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 19:51:00,233 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 19:51:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:00,233 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 19:51:00,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:51:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 19:51:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:51:00,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:00,234 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-23 19:51:00,234 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:00,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-23 19:51:00,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:00,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:00,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:00,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:01,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:01,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:01,627 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:01,670 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 19:51:01,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:01,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:01,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:01,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-09-23 19:51:01,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:51:01,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:51:01,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:51:01,726 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-23 19:51:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:01,839 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:51:01,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:51:01,840 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-23 19:51:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:01,841 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:01,841 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:01,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:51:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:51:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:51:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:51:01,844 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 19:51:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:01,845 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:51:01,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:51:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:51:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:51:01,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:01,845 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-23 19:51:01,846 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:01,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-23 19:51:01,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:01,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:01,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:01,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:01,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:03,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:03,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:03,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:03,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-23 19:51:03,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:51:03,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:51:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:51:03,593 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-23 19:51:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:03,769 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 19:51:03,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:51:03,770 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-23 19:51:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:03,770 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:51:03,770 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:51:03,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:51:03,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:51:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:51:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:51:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 19:51:03,775 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 19:51:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:03,775 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 19:51:03,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:51:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 19:51:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:51:03,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:03,776 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-23 19:51:03,776 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:03,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-23 19:51:03,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:03,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:03,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:03,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:03,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:05,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:05,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:05,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:05,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:05,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:05,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:05,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:05,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-09-23 19:51:05,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:51:05,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:51:05,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:51:05,315 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-23 19:51:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:05,398 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:51:05,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:51:05,399 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-23 19:51:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:05,400 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:51:05,400 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:51:05,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:51:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:51:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:51:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:51:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:51:05,404 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 19:51:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:05,404 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:51:05,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:51:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:51:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:51:05,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:05,405 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-23 19:51:05,405 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:05,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:05,405 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-23 19:51:05,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:05,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:05,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:05,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:05,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:07,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:07,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:07,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:07,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:51:07,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:07,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:07,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:07,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-23 19:51:07,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:51:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:51:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:51:07,245 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-23 19:51:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:07,396 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 19:51:07,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:51:07,396 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-23 19:51:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:07,397 INFO L225 Difference]: With dead ends: 64 [2018-09-23 19:51:07,397 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:51:07,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:51:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:51:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:51:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:51:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 19:51:07,401 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 19:51:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:07,401 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 19:51:07,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:51:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 19:51:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:51:07,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:07,402 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-23 19:51:07,402 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:07,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-23 19:51:07,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:07,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:07,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:07,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:09,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:09,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:09,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:09,241 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:09,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:09,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:09,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:09,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-09-23 19:51:09,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:51:09,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:51:09,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:51:09,303 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-23 19:51:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:09,416 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:51:09,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:51:09,416 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-23 19:51:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:09,417 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:51:09,417 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:51:09,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:51:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:51:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:51:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:51:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:51:09,421 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 19:51:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:09,422 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:51:09,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:51:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:51:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:51:09,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:09,423 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-23 19:51:09,423 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:09,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:09,423 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-23 19:51:09,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:09,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:09,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:09,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:11,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:11,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:11,628 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:11,675 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:51:11,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:11,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:11,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:11,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-23 19:51:11,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:51:11,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:51:11,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:51:11,737 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-23 19:51:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:11,886 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 19:51:11,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:51:11,886 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-23 19:51:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:11,887 INFO L225 Difference]: With dead ends: 66 [2018-09-23 19:51:11,887 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:51:11,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:51:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:51:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:51:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:51:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 19:51:11,891 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 19:51:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:11,891 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 19:51:11,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:51:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 19:51:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:51:11,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:11,892 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-23 19:51:11,892 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:11,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-23 19:51:11,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:11,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:11,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:11,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:11,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:15,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:15,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:15,511 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:15,560 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:51:15,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:15,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:15,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:15,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-09-23 19:51:15,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:51:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:51:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:51:15,624 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-23 19:51:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:15,787 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:51:15,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:51:15,788 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-23 19:51:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:15,788 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:51:15,789 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:51:15,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:51:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:51:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:51:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:51:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:51:15,792 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 19:51:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:15,793 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:51:15,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:51:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:51:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:51:15,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:15,793 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-23 19:51:15,793 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:15,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-23 19:51:15,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:15,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:15,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:15,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:15,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:17,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:17,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:17,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:17,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:17,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:17,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-23 19:51:17,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:51:17,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:51:17,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:51:17,539 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-23 19:51:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:17,639 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 19:51:17,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:51:17,640 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-23 19:51:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:17,641 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:51:17,641 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:51:17,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:51:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:51:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:51:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:51:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 19:51:17,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 19:51:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:17,645 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 19:51:17,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:51:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 19:51:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:51:17,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:17,646 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-23 19:51:17,646 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:17,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:17,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-23 19:51:17,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:17,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:17,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:17,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:17,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:20,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:20,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:20,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:20,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:20,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:20,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:20,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:20,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-09-23 19:51:20,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:51:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:51:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:51:20,645 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-23 19:51:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:20,882 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:51:20,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:51:20,882 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-23 19:51:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:20,883 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:51:20,883 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:51:20,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:51:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:51:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:51:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:51:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:51:20,887 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 19:51:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:20,888 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:51:20,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:51:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:51:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:51:20,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:20,889 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-23 19:51:20,889 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:20,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-23 19:51:20,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:20,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:20,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:20,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:20,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:23,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:23,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:23,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 19:51:23,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:23,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:23,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-23 19:51:23,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:51:23,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:51:23,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:51:23,567 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-23 19:51:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:23,685 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 19:51:23,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:51:23,688 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-23 19:51:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:23,688 INFO L225 Difference]: With dead ends: 70 [2018-09-23 19:51:23,688 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:51:23,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:51:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:51:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:51:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:51:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 19:51:23,692 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 19:51:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:23,693 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 19:51:23,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:51:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 19:51:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:51:23,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:23,694 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-23 19:51:23,694 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:23,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-23 19:51:23,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:23,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:23,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:23,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:25,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:25,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:25,858 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:25,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:25,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:25,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-09-23 19:51:25,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:51:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:51:25,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:51:25,926 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-23 19:51:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:26,066 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:51:26,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:51:26,067 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-23 19:51:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:26,068 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:51:26,068 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:51:26,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:51:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:51:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:51:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:51:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:51:26,071 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 19:51:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:26,072 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:51:26,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:51:26,072 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:51:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:51:26,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:26,072 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-23 19:51:26,072 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:26,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:26,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-23 19:51:26,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:26,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:26,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:26,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:26,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:27,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:27,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:27,897 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:27,954 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:51:27,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:27,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:28,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:28,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-23 19:51:28,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:51:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:51:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:51:28,003 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-23 19:51:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:28,130 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 19:51:28,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:51:28,131 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-23 19:51:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:28,132 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:51:28,132 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:51:28,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:51:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:51:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:51:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:51:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 19:51:28,136 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 19:51:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:28,137 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 19:51:28,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:51:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 19:51:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:51:28,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:28,137 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-23 19:51:28,138 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:28,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-23 19:51:28,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:28,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:28,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:28,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:28,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:30,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:30,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:30,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:30,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 19:51:30,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:30,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:30,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:30,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-09-23 19:51:30,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:51:30,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:51:30,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:51:30,468 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-23 19:51:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:30,837 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:51:30,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:51:30,838 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-23 19:51:30,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:30,839 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:51:30,839 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:51:30,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:51:30,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:51:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:51:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:51:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:51:30,842 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 19:51:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:30,843 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:51:30,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:51:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:51:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:51:30,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:30,843 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-23 19:51:30,844 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:30,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:30,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-23 19:51:30,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:30,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:30,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:30,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:30,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:32,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:32,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:32,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:32,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:32,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:32,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-23 19:51:32,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:51:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:51:32,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:51:32,964 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-23 19:51:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:33,082 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 19:51:33,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:51:33,083 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-23 19:51:33,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:33,084 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:51:33,084 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 19:51:33,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:51:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 19:51:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 19:51:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:51:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 19:51:33,087 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 19:51:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:33,087 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 19:51:33,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:51:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 19:51:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:51:33,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:33,088 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-23 19:51:33,089 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:33,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-23 19:51:33,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:33,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:33,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:33,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:33,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:35,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:35,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:35,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:35,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:35,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:35,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:35,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:35,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-09-23 19:51:35,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:51:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:51:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:51:35,430 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-23 19:51:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:35,600 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:51:35,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:51:35,600 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-23 19:51:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:35,601 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:51:35,601 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:51:35,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:51:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:51:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:51:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:51:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 19:51:35,603 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 19:51:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:35,604 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 19:51:35,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:51:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 19:51:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:51:35,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:35,605 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-23 19:51:35,605 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:35,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-09-23 19:51:35,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:35,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:35,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:35,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:35,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:37,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:37,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:37,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:37,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 19:51:37,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:37,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:37,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:37,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-23 19:51:37,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:51:37,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:51:37,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:51:37,971 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-23 19:51:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:39,282 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 19:51:39,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:51:39,283 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-23 19:51:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:39,283 INFO L225 Difference]: With dead ends: 76 [2018-09-23 19:51:39,283 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:51:39,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:51:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:51:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 19:51:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:51:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 19:51:39,287 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 19:51:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:39,287 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 19:51:39,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:51:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 19:51:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:51:39,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:39,288 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-23 19:51:39,288 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:39,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-09-23 19:51:39,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:39,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:39,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:39,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:39,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:41,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:41,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:41,401 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:41,440 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:41,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:41,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:41,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:41,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-09-23 19:51:41,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:51:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:51:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:51:41,496 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-23 19:51:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:41,656 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:51:41,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:51:41,657 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-23 19:51:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:41,657 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:51:41,658 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:51:41,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:51:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:51:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:51:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:51:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:51:41,661 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 19:51:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:41,662 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:51:41,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:51:41,662 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:51:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:51:41,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:41,662 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-23 19:51:41,663 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:41,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:41,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-09-23 19:51:41,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:41,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:41,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:41,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:41,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:44,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:44,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:44,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:44,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:51:44,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:44,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:44,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:44,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-23 19:51:44,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:51:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:51:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:51:44,598 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-23 19:51:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:44,856 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 19:51:44,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:51:44,857 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-23 19:51:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:44,858 INFO L225 Difference]: With dead ends: 78 [2018-09-23 19:51:44,858 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:51:44,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:51:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:51:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:51:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:51:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 19:51:44,863 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 19:51:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:44,863 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 19:51:44,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:51:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 19:51:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 19:51:44,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:44,864 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-23 19:51:44,864 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:44,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-09-23 19:51:44,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:44,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:44,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:44,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:44,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:47,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:47,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:47,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:47,555 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:51:47,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:47,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:47,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:47,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2018-09-23 19:51:47,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:51:47,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:51:47,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:51:47,621 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-23 19:51:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:47,739 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:51:47,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:51:47,739 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-23 19:51:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:47,740 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:51:47,740 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:51:47,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:51:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:51:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:51:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:51:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 19:51:47,744 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 19:51:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:47,744 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 19:51:47,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:51:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 19:51:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:51:47,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:47,745 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-23 19:51:47,745 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:47,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:47,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-09-23 19:51:47,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:47,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:47,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:47,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:47,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:50,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:50,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:50,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:50,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:50,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:50,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-23 19:51:50,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:51:50,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:51:50,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:51:50,880 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-23 19:51:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:51,054 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 19:51:51,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:51:51,054 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-23 19:51:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:51,055 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:51:51,055 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:51:51,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:51:51,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:51:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 19:51:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:51:51,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 19:51:51,058 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 19:51:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:51,058 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 19:51:51,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:51:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 19:51:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:51:51,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:51,058 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-23 19:51:51,059 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:51,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-09-23 19:51:51,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:51,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:51,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:51,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:51,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:53,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:53,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:53,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:53,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:53,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:53,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:53,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:53,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2018-09-23 19:51:53,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:51:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:51:53,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:51:53,600 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-23 19:51:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:53,747 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:51:53,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:51:53,747 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-23 19:51:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:53,748 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:51:53,748 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:51:53,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:51:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:51:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:51:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:51:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:51:53,751 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 19:51:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:53,751 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:51:53,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:51:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:51:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:51:53,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:53,752 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-23 19:51:53,752 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:53,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:53,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-09-23 19:51:53,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:53,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:53,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:53,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:53,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:56,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:56,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:56,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:56,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 19:51:56,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:56,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:56,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:56,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-23 19:51:56,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:51:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:51:56,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:51:56,611 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-23 19:51:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:56,736 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 19:51:56,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:51:56,736 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-23 19:51:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:56,737 INFO L225 Difference]: With dead ends: 82 [2018-09-23 19:51:56,737 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:51:56,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:51:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:51:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 19:51:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:51:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 19:51:56,741 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 19:51:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:56,742 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 19:51:56,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:51:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 19:51:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 19:51:56,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:56,742 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-23 19:51:56,743 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:56,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-09-23 19:51:56,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:56,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:56,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:56,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:56,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:59,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:59,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:59,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:59,505 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:59,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:59,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:59,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:59,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2018-09-23 19:51:59,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:51:59,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:51:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:51:59,553 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-23 19:52:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:00,534 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:52:00,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:52:00,535 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-23 19:52:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:00,536 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:52:00,536 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:52:00,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:52:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:52:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:52:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:52:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 19:52:00,539 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 19:52:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:00,539 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 19:52:00,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:52:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 19:52:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:52:00,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:00,540 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-23 19:52:00,540 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:00,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:00,540 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-09-23 19:52:00,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:00,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:00,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:00,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:00,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:03,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:03,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:03,097 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:03,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 19:52:03,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:03,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:03,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:03,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-09-23 19:52:03,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:52:03,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:52:03,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:52:03,208 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-23 19:52:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:03,323 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 19:52:03,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:52:03,323 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-23 19:52:03,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:03,324 INFO L225 Difference]: With dead ends: 84 [2018-09-23 19:52:03,324 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:52:03,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:52:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:52:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:52:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:52:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 19:52:03,327 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 19:52:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:03,328 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 19:52:03,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:52:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 19:52:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 19:52:03,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:03,329 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-23 19:52:03,329 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:03,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-09-23 19:52:03,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:03,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:03,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:03,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:03,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:06,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:06,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:06,533 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:06,599 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 19:52:06,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:06,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:06,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:06,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2018-09-23 19:52:06,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:52:06,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:52:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:52:06,665 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-23 19:52:06,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:06,815 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:52:06,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:52:06,815 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-23 19:52:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:06,816 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:52:06,817 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:52:06,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:52:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:52:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:52:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:52:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:52:06,821 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 19:52:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:06,821 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:52:06,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:52:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:52:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:52:06,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:06,822 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-23 19:52:06,822 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:06,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-09-23 19:52:06,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:06,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:06,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:06,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:06,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:09,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:09,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:09,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:09,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:09,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:09,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-09-23 19:52:09,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:52:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:52:09,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:52:09,977 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-23 19:52:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:10,150 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-23 19:52:10,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:52:10,151 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-23 19:52:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:10,152 INFO L225 Difference]: With dead ends: 86 [2018-09-23 19:52:10,152 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 19:52:10,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:52:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 19:52:10,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 19:52:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:52:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 19:52:10,156 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 19:52:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:10,156 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 19:52:10,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:52:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 19:52:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:52:10,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:10,157 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-23 19:52:10,157 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:10,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-09-23 19:52:10,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:10,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:10,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:10,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:10,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:13,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:13,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:13,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:13,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:13,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:13,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:13,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:13,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2018-09-23 19:52:13,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:52:13,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:52:13,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:52:13,551 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-23 19:52:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:14,447 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:52:14,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:52:14,448 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-23 19:52:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:14,448 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:52:14,449 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:52:14,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:52:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:52:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:52:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:52:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 19:52:14,452 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-23 19:52:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:14,453 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 19:52:14,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:52:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 19:52:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:52:14,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:14,453 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-23 19:52:14,453 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:14,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:14,454 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-09-23 19:52:14,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:14,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:14,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:14,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:14,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:17,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:17,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:17,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:17,390 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 19:52:17,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:17,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:17,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:17,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-09-23 19:52:17,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:52:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:52:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:52:17,443 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-23 19:52:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:17,644 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-23 19:52:17,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:52:17,645 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-23 19:52:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:17,646 INFO L225 Difference]: With dead ends: 88 [2018-09-23 19:52:17,646 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:52:17,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:52:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:52:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 19:52:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:52:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 19:52:17,648 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-23 19:52:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:17,648 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 19:52:17,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:52:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 19:52:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 19:52:17,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:17,649 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-23 19:52:17,650 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:17,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:17,650 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-09-23 19:52:17,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:17,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:17,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:17,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:21,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:21,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:21,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:21,136 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:21,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:21,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:21,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:21,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2018-09-23 19:52:21,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:52:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:52:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:52:21,213 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-23 19:52:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:21,763 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:52:21,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:52:21,763 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-23 19:52:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:21,764 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:52:21,765 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:52:21,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:52:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:52:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:52:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:52:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 19:52:21,769 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-23 19:52:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:21,769 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 19:52:21,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:52:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 19:52:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:52:21,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:21,770 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-23 19:52:21,770 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:21,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:21,770 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-09-23 19:52:21,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:21,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:21,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:21,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:21,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:24,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:24,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:24,826 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:24,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 19:52:24,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:24,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:24,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:24,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-09-23 19:52:24,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:52:24,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:52:24,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:52:24,954 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-23 19:52:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:25,259 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-23 19:52:25,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:52:25,260 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-23 19:52:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:25,261 INFO L225 Difference]: With dead ends: 90 [2018-09-23 19:52:25,261 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:52:25,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:52:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:52:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 19:52:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:52:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 19:52:25,264 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-23 19:52:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:25,265 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 19:52:25,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:52:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 19:52:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 19:52:25,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:25,266 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-23 19:52:25,266 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:25,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:25,266 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-09-23 19:52:25,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:25,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:25,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:25,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:25,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:28,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:28,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:28,418 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:52:28,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:28,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:28,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2018-09-23 19:52:28,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:52:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:52:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:52:28,468 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-23 19:52:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:28,684 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:52:28,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:52:28,685 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-23 19:52:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:28,685 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:52:28,686 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:52:28,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:52:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:52:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:52:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:52:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 19:52:28,689 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-23 19:52:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:28,689 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 19:52:28,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:52:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 19:52:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:52:28,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:28,690 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-23 19:52:28,690 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:28,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-09-23 19:52:28,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:28,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:28,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:28,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:28,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:31,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:31,975 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 [2018-09-23 19:52:31,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:32,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:32,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:32,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-09-23 19:52:32,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:52:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:52:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:52:32,087 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-23 19:52:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:32,225 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-23 19:52:32,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:52:32,225 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-23 19:52:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:32,226 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:52:32,227 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 19:52:32,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:52:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 19:52:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 19:52:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 19:52:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 19:52:32,230 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-23 19:52:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:32,231 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 19:52:32,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:52:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 19:52:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:52:32,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:32,232 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-23 19:52:32,232 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:32,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:32,232 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-09-23 19:52:32,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:32,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:32,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:32,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:32,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:35,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:35,603 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 [2018-09-23 19:52:35,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:35,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:35,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:35,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:35,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:35,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2018-09-23 19:52:35,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:52:35,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:52:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:52:35,708 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-23 19:52:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:35,935 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:52:35,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:52:35,935 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-23 19:52:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:35,936 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:52:35,937 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:52:35,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:52:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:52:35,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:52:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:52:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 19:52:35,940 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-23 19:52:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:35,940 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 19:52:35,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:52:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 19:52:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:52:35,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:35,941 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-23 19:52:35,941 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:35,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-09-23 19:52:35,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:35,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:35,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:35,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:35,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:39,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:39,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:39,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:39,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 19:52:39,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:39,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:39,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:39,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-09-23 19:52:39,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 19:52:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 19:52:39,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:52:39,322 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-23 19:52:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:39,466 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-23 19:52:39,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:52:39,467 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-23 19:52:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:39,468 INFO L225 Difference]: With dead ends: 94 [2018-09-23 19:52:39,468 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:52:39,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:52:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:52:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 19:52:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:52:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 19:52:39,471 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-23 19:52:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:39,471 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 19:52:39,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 19:52:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 19:52:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 19:52:39,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:39,472 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-23 19:52:39,472 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:39,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:39,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-09-23 19:52:39,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:39,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:39,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:39,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:39,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:42,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:42,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:42,990 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:43,044 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:43,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:43,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:43,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:43,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2018-09-23 19:52:43,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:52:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:52:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:52:43,094 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-23 19:52:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:43,342 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:52:43,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:52:43,343 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-23 19:52:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:43,344 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:52:43,344 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:52:43,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:52:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:52:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:52:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:52:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 19:52:43,348 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-23 19:52:43,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:43,348 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 19:52:43,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:52:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 19:52:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:52:43,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:43,348 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-23 19:52:43,349 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:43,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-09-23 19:52:43,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:43,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:43,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:43,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:43,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:47,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:47,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:47,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:47,173 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 19:52:47,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:47,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:47,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:47,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-09-23 19:52:47,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 19:52:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 19:52:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:52:47,279 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-23 19:52:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:47,496 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-23 19:52:47,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 19:52:47,496 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-23 19:52:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:47,497 INFO L225 Difference]: With dead ends: 96 [2018-09-23 19:52:47,497 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 19:52:47,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:52:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 19:52:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 19:52:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:52:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 19:52:47,500 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-23 19:52:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:47,500 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 19:52:47,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 19:52:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 19:52:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:52:47,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:47,501 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-23 19:52:47,501 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:47,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-09-23 19:52:47,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:47,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:47,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:47,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:47,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:51,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:51,200 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 [2018-09-23 19:52:51,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:51,290 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 19:52:51,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:51,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:51,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:51,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2018-09-23 19:52:51,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:52:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:52:51,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:52:51,342 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-23 19:52:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:51,502 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:52:51,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:52:51,502 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-23 19:52:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:51,503 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:52:51,503 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:52:51,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:52:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:52:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:52:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:52:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 19:52:51,507 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-23 19:52:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:51,507 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 19:52:51,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:52:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 19:52:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:52:51,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:51,508 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-23 19:52:51,508 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:51,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-09-23 19:52:51,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:51,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:51,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:51,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:51,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:54,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:54,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:54,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:55,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:55,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-09-23 19:52:55,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 19:52:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 19:52:55,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:52:55,040 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-23 19:52:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:55,195 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-23 19:52:55,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 19:52:55,195 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-23 19:52:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:55,196 INFO L225 Difference]: With dead ends: 98 [2018-09-23 19:52:55,196 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 19:52:55,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:52:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 19:52:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 19:52:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 19:52:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 19:52:55,200 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-23 19:52:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:55,200 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 19:52:55,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 19:52:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 19:52:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 19:52:55,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:55,201 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-23 19:52:55,201 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:55,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-09-23 19:52:55,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:55,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:55,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:55,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:55,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:58,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:58,985 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 [2018-09-23 19:52:58,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:59,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:59,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:59,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:59,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2018-09-23 19:52:59,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:52:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:52:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:52:59,123 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-23 19:52:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:59,296 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:52:59,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:52:59,297 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-23 19:52:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:59,298 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:52:59,298 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:52:59,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:52:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:52:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:52:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:52:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 19:52:59,302 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-23 19:52:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:59,302 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 19:52:59,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:52:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 19:52:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:52:59,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:59,303 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-23 19:52:59,303 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:59,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-09-23 19:52:59,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:59,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:59,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:59,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:59,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:03,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:03,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:03,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:03,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 19:53:03,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:03,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:03,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:03,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-09-23 19:53:03,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 19:53:03,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 19:53:03,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:53:03,321 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-23 19:53:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:03,510 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-23 19:53:03,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:53:03,511 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-23 19:53:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:03,511 INFO L225 Difference]: With dead ends: 100 [2018-09-23 19:53:03,512 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:53:03,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:53:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:53:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 19:53:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 19:53:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 19:53:03,515 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-23 19:53:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:03,516 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 19:53:03,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 19:53:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 19:53:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 19:53:03,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:03,517 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-23 19:53:03,517 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:03,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-09-23 19:53:03,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:03,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:03,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:03,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:07,575 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 [2018-09-23 19:53:07,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:07,645 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:07,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:07,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:07,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2018-09-23 19:53:07,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:53:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:53:07,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:53:07,699 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-23 19:53:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:07,871 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:53:07,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:53:07,872 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-23 19:53:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:07,873 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:53:07,873 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:53:07,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:53:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:53:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:53:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:53:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 19:53:07,878 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-23 19:53:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:07,878 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 19:53:07,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:53:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 19:53:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:53:07,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:07,879 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-23 19:53:07,879 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:07,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:07,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-09-23 19:53:07,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:07,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:07,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:07,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:11,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:11,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:11,939 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:12,028 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 19:53:12,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:12,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:12,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-09-23 19:53:12,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 19:53:12,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 19:53:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:53:12,080 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-23 19:53:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:12,286 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-23 19:53:12,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 19:53:12,287 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-23 19:53:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:12,287 INFO L225 Difference]: With dead ends: 102 [2018-09-23 19:53:12,287 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 19:53:12,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:53:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 19:53:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 19:53:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:53:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 19:53:12,291 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-23 19:53:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:12,291 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 19:53:12,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 19:53:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 19:53:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 19:53:12,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:12,292 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-23 19:53:12,292 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:12,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:12,293 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-09-23 19:53:12,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:12,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:12,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:12,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:16,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:16,450 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 [2018-09-23 19:53:16,457 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:16,544 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:53:16,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:16,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:16,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:16,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2018-09-23 19:53:16,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:53:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:53:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:53:16,598 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-23 19:53:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:16,799 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:53:16,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 19:53:16,799 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-23 19:53:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:16,800 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:53:16,801 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:53:16,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:53:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:53:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:53:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:53:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 19:53:16,803 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-23 19:53:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:16,804 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 19:53:16,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:53:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 19:53:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:53:16,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:16,804 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-23 19:53:16,804 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:16,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-09-23 19:53:16,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:16,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:16,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:16,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:16,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:20,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:20,760 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 [2018-09-23 19:53:20,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:20,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:20,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:20,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-09-23 19:53:20,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:53:20,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:53:20,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:53:20,882 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-23 19:53:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:21,180 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 19:53:21,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 19:53:21,181 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-23 19:53:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:21,181 INFO L225 Difference]: With dead ends: 104 [2018-09-23 19:53:21,181 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 19:53:21,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:53:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 19:53:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 19:53:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 19:53:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 19:53:21,185 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-23 19:53:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:21,185 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 19:53:21,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:53:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 19:53:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:53:21,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:21,186 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-23 19:53:21,186 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:21,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-09-23 19:53:21,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:21,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:21,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:21,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:21,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:25,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:25,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:25,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:25,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:25,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:25,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:25,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:25,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2018-09-23 19:53:25,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:53:25,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:53:25,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:53:25,269 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-23 19:53:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:25,560 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:53:25,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 19:53:25,561 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-23 19:53:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:25,562 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:53:25,562 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:53:25,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:53:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:53:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:53:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:53:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 19:53:25,565 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-23 19:53:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:25,565 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 19:53:25,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:53:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 19:53:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:53:25,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:25,566 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-23 19:53:25,566 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:25,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-09-23 19:53:25,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:25,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:25,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:25,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:25,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:29,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:29,951 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 [2018-09-23 19:53:29,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:30,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 19:53:30,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:30,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:30,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:30,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-09-23 19:53:30,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 19:53:30,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 19:53:30,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:53:30,107 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-23 19:53:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:30,302 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-23 19:53:30,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 19:53:30,302 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-23 19:53:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:30,303 INFO L225 Difference]: With dead ends: 106 [2018-09-23 19:53:30,303 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:53:30,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:53:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:53:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 19:53:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:53:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 19:53:30,308 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-23 19:53:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:30,308 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 19:53:30,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 19:53:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 19:53:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:53:30,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:30,309 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-23 19:53:30,309 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:30,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:30,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-09-23 19:53:30,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:30,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:30,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:30,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:30,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:34,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:34,752 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 [2018-09-23 19:53:34,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:34,819 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:34,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:34,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:34,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:34,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2018-09-23 19:53:34,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:53:34,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:53:34,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:53:34,872 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-23 19:53:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:35,097 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:53:35,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 19:53:35,098 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-23 19:53:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:35,099 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:53:35,099 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:53:35,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:53:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:53:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:53:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:53:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 19:53:35,103 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-23 19:53:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:35,103 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 19:53:35,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:53:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 19:53:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:53:35,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:35,104 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-23 19:53:35,104 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:35,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-09-23 19:53:35,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:35,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:35,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:35,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:35,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:39,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:39,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:39,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:39,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-23 19:53:39,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:39,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:39,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:39,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-09-23 19:53:39,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 19:53:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 19:53:39,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:53:39,835 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-09-23 19:53:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:40,138 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-23 19:53:40,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 19:53:40,138 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-09-23 19:53:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:40,140 INFO L225 Difference]: With dead ends: 108 [2018-09-23 19:53:40,140 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:53:40,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:53:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:53:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 19:53:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:53:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 19:53:40,144 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-23 19:53:40,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:40,144 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 19:53:40,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 19:53:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 19:53:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 19:53:40,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:40,145 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-23 19:53:40,145 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:40,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-09-23 19:53:40,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:40,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:40,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:40,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:40,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:44,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:44,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:44,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:44,868 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-23 19:53:44,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:44,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:44,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:44,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2018-09-23 19:53:44,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:53:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:53:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:53:44,943 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-23 19:53:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:45,192 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:53:45,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 19:53:45,192 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-23 19:53:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:45,193 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:53:45,193 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:53:45,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:53:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:53:45,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:53:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:53:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 19:53:45,197 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-23 19:53:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:45,198 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 19:53:45,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:53:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 19:53:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:53:45,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:45,199 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-23 19:53:45,199 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:45,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:45,199 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-09-23 19:53:45,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:45,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:45,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:45,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:49,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:49,770 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 [2018-09-23 19:53:49,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:49,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:49,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:49,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-09-23 19:53:49,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 19:53:49,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 19:53:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:53:49,909 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-09-23 19:53:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:50,136 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-23 19:53:50,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 19:53:50,136 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-09-23 19:53:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:50,137 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:53:50,137 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:53:50,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:53:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:53:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 19:53:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 19:53:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 19:53:50,141 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-23 19:53:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:50,142 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 19:53:50,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 19:53:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 19:53:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:53:50,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:50,143 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-23 19:53:50,143 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:50,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-09-23 19:53:50,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:50,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:50,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:50,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:50,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:54,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:54,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:54,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:55,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:55,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:55,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:55,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:55,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2018-09-23 19:53:55,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:53:55,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:53:55,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:53:55,114 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-23 19:53:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:55,431 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:53:55,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 19:53:55,431 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-23 19:53:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:55,432 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:53:55,432 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:53:55,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:53:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:53:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:53:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:53:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 19:53:55,435 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-23 19:53:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:55,435 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 19:53:55,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:53:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 19:53:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:53:55,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:55,436 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-23 19:53:55,436 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:55,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:55,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-09-23 19:53:55,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:55,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:55,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:55,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:55,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:00,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:00,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:54:00,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:00,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-23 19:54:00,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:00,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:00,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:00,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-09-23 19:54:00,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 19:54:00,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 19:54:00,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:54:00,567 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-09-23 19:54:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:00,829 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-23 19:54:00,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 19:54:00,829 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-09-23 19:54:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:00,830 INFO L225 Difference]: With dead ends: 112 [2018-09-23 19:54:00,830 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:54:00,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:54:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:54:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 19:54:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:54:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 19:54:00,834 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-23 19:54:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:00,834 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 19:54:00,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 19:54:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 19:54:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 19:54:00,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:00,835 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-23 19:54:00,835 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:00,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:00,836 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-09-23 19:54:00,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:00,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:00,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:00,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:00,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:05,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:05,707 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 [2018-09-23 19:54:05,715 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:05,780 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:05,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:05,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:05,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:05,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2018-09-23 19:54:05,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:54:05,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:54:05,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:54:05,849 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-23 19:54:06,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:06,044 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:54:06,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 19:54:06,045 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-23 19:54:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:06,045 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:54:06,045 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:54:06,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:54:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:54:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:54:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:54:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 19:54:06,050 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-23 19:54:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:06,050 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 19:54:06,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:54:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 19:54:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:54:06,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:06,051 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-23 19:54:06,051 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:06,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:06,051 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-09-23 19:54:06,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:06,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:06,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:06,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:06,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:54:06,960 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:54:06,964 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:54:06,964 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:54:06 BoogieIcfgContainer [2018-09-23 19:54:06,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:54:06,965 INFO L168 Benchmark]: Toolchain (without parser) took 236249.42 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -191.4 MB). Free memory was 1.5 GB in the beginning and 979.3 MB in the end (delta: 493.2 MB). Peak memory consumption was 301.8 MB. Max. memory is 7.1 GB. [2018-09-23 19:54:06,966 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:54:06,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:54:06,967 INFO L168 Benchmark]: Boogie Preprocessor took 24.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:54:06,967 INFO L168 Benchmark]: RCFGBuilder took 223.19 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:54:06,968 INFO L168 Benchmark]: TraceAbstraction took 235951.64 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -191.4 MB). Free memory was 1.5 GB in the beginning and 979.3 MB in the end (delta: 472.1 MB). Peak memory consumption was 280.7 MB. Max. memory is 7.1 GB. [2018-09-23 19:54:06,970 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 0.24 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 43.81 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 24.66 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 223.19 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235951.64 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -191.4 MB). Free memory was 1.5 GB in the beginning and 979.3 MB in the end (delta: 472.1 MB). Peak memory consumption was 280.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 111 with TraceHistMax 107, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 109 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 235.8s OverallTime, 108 OverallIterations, 107 TraceHistogramMax, 19.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 323 SDtfs, 2 SDslu, 4042 SDs, 0 SdLazy, 9970 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11768 GetRequests, 5884 SyntacticMatches, 0 SemanticMatches, 5884 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11130 ImplicationChecksByTransitivity, 199.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 107 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 5.5s SatisfiabilityAnalysisTime, 203.8s InterpolantComputationTime, 11981 NumberOfCodeBlocks, 11981 NumberOfCodeBlocksAsserted, 1662 NumberOfCheckSat, 11768 ConstructedInterpolants, 0 QuantifiedInterpolants, 4186902 SizeOfPredicates, 212 NumberOfNonLiveVariables, 23638 ConjunctsInSsa, 5883 ConjunctsInUnsatCore, 213 InterpolantComputations, 1 PerfectInterpolantSequences, 0/408312 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/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-54-06-979.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-54-06-979.csv Completed graceful shutdown