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_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 01:08:14,641 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 01:08:14,643 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 01:08:14,655 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-01 01:08:14,655 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-01 01:08:14,656 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-01 01:08:14,658 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-01 01:08:14,660 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-01 01:08:14,662 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-01 01:08:14,663 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-01 01:08:14,664 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-01 01:08:14,691 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-01 01:08:14,707 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 01:08:14,708 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 01:08:14,709 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 01:08:14,709 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 01:08:14,710 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 01:08:14,710 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 01:08:14,710 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 01:08:14,710 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 01:08:14,711 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 01:08:14,711 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 01:08:14,711 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 01:08:14,711 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 01:08:14,712 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 01:08:14,712 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 01:08:14,712 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 01:08:14,712 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 01:08:14,713 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 01:08:14,713 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 01:08:14,713 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 01:08:14,713 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 01:08:14,713 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 01:08:14,714 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 01:08:14,714 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 01:08:14,714 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 01:08:14,714 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 01:08:14,714 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 01:08:14,715 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 01:08:14,715 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 01:08:14,715 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 01:08:14,715 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 01:08:14,716 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 01:08:14,782 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 01:08:14,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 01:08:14,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 01:08:14,809 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 01:08:14,810 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 01:08:14,811 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-10-01 01:08:14,811 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-10-01 01:08:14,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 01:08:14,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 01:08:14,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 01:08:14,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 01:08:14,871 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 01:08:14,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,913 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-01 01:08:14,913 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-01 01:08:14,913 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-01 01:08:14,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 01:08:14,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 01:08:14,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 01:08:14,918 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 01:08:14,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... [2018-10-01 01:08:14,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 01:08:14,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 01:08:14,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 01:08:14,947 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 01:08:14,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 01:08:15,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-01 01:08:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-01 01:08:15,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-01 01:08:15,241 INFO L345 CfgBuilder]: Using library mode [2018-10-01 01:08:15,241 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 01:08:15 BoogieIcfgContainer [2018-10-01 01:08:15,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 01:08:15,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 01:08:15,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 01:08:15,246 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 01:08:15,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:08:14" (1/2) ... [2018-10-01 01:08:15,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3911ee and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 01:08:15, skipping insertion in model container [2018-10-01 01:08:15,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 01:08:15" (2/2) ... [2018-10-01 01:08:15,250 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-10-01 01:08:15,260 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 01:08:15,268 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 01:08:15,321 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 01:08:15,322 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 01:08:15,322 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 01:08:15,322 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 01:08:15,322 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 01:08:15,322 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 01:08:15,323 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 01:08:15,323 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 01:08:15,323 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 01:08:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-01 01:08:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-01 01:08:15,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:15,347 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-01 01:08:15,348 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:15,355 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-10-01 01:08:15,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:15,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:15,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:15,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:15,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:15,581 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 01:08:15,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-01 01:08:15,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 01:08:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 01:08:15,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:15,603 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-01 01:08:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:15,843 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-10-01 01:08:15,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 01:08:15,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-01 01:08:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:15,858 INFO L225 Difference]: With dead ends: 15 [2018-10-01 01:08:15,858 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 01:08:15,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 01:08:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-10-01 01:08:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-01 01:08:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-10-01 01:08:15,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-10-01 01:08:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:15,898 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-10-01 01:08:15,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 01:08:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-10-01 01:08:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-01 01:08:15,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:15,899 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-01 01:08:15,900 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:15,900 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:15,900 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-10-01 01:08:15,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:15,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:15,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:15,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:15,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:15,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:15,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:15,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:15,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:16,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:16,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-01 01:08:16,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 01:08:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 01:08:16,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:16,085 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-10-01 01:08:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:16,363 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-10-01 01:08:16,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 01:08:16,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-01 01:08:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:16,365 INFO L225 Difference]: With dead ends: 11 [2018-10-01 01:08:16,366 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 01:08:16,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 01:08:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-10-01 01:08:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 01:08:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-01 01:08:16,371 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-01 01:08:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:16,371 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-01 01:08:16,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 01:08:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-01 01:08:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-01 01:08:16,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:16,372 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-01 01:08:16,373 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:16,374 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:16,374 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-10-01 01:08:16,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:16,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:16,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:16,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:16,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:16,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:16,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:16,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:16,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:16,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:16,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-01 01:08:16,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 01:08:16,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 01:08:16,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:16,536 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-01 01:08:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:16,802 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-10-01 01:08:16,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 01:08:16,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-01 01:08:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:16,804 INFO L225 Difference]: With dead ends: 12 [2018-10-01 01:08:16,804 INFO L226 Difference]: Without dead ends: 10 [2018-10-01 01:08:16,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-01 01:08:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-10-01 01:08:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 01:08:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-01 01:08:16,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-01 01:08:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:16,809 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-01 01:08:16,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 01:08:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-01 01:08:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 01:08:16,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:16,810 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-10-01 01:08:16,811 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:16,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-10-01 01:08:16,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:16,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:16,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:16,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:16,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:16,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:16,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:16,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:16,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:16,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:16,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:16,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:16,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 01:08:16,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 01:08:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 01:08:16,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:16,963 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-10-01 01:08:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:17,053 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-10-01 01:08:17,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 01:08:17,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-01 01:08:17,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:17,055 INFO L225 Difference]: With dead ends: 14 [2018-10-01 01:08:17,055 INFO L226 Difference]: Without dead ends: 12 [2018-10-01 01:08:17,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-01 01:08:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-10-01 01:08:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 01:08:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-01 01:08:17,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-01 01:08:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:17,059 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-01 01:08:17,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 01:08:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-01 01:08:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 01:08:17,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:17,060 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-01 01:08:17,060 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:17,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-10-01 01:08:17,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:17,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:17,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:17,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:17,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:17,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:17,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:17,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:17,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:17,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:17,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 01:08:17,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 01:08:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 01:08:17,256 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:17,256 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-10-01 01:08:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:17,366 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-10-01 01:08:17,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 01:08:17,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-01 01:08:17,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:17,369 INFO L225 Difference]: With dead ends: 14 [2018-10-01 01:08:17,369 INFO L226 Difference]: Without dead ends: 12 [2018-10-01 01:08:17,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-01 01:08:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-10-01 01:08:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 01:08:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-01 01:08:17,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-01 01:08:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:17,374 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-01 01:08:17,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 01:08:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-01 01:08:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 01:08:17,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:17,375 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-01 01:08:17,375 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:17,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:17,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-10-01 01:08:17,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:17,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:17,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:17,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:17,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:17,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:17,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:17,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:17,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:17,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:17,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:17,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:17,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 01:08:17,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 01:08:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 01:08:17,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:17,496 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-10-01 01:08:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:17,950 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-10-01 01:08:17,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 01:08:17,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-01 01:08:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:17,952 INFO L225 Difference]: With dead ends: 17 [2018-10-01 01:08:17,952 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 01:08:17,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 01:08:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-10-01 01:08:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 01:08:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-01 01:08:17,956 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-10-01 01:08:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:17,957 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-01 01:08:17,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 01:08:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-01 01:08:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 01:08:17,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:17,960 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-10-01 01:08:17,960 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:17,960 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:17,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-10-01 01:08:17,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:17,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:17,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:17,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:17,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:18,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:18,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:18,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:18,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:18,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:18,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:18,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:18,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 01:08:18,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 01:08:18,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 01:08:18,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:18,086 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-10-01 01:08:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:18,174 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-10-01 01:08:18,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 01:08:18,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-01 01:08:18,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:18,177 INFO L225 Difference]: With dead ends: 16 [2018-10-01 01:08:18,177 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 01:08:18,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 01:08:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-10-01 01:08:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 01:08:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-01 01:08:18,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-01 01:08:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:18,182 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-01 01:08:18,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 01:08:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-01 01:08:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:08:18,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:18,183 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-10-01 01:08:18,183 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:18,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:18,184 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-10-01 01:08:18,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:18,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:18,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:18,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:18,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:18,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:18,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:18,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:18,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 01:08:18,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:18,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:18,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:18,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:08:18,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:08:18,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:08:18,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:18,418 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-10-01 01:08:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:18,517 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-01 01:08:18,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:08:18,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-01 01:08:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:18,519 INFO L225 Difference]: With dead ends: 19 [2018-10-01 01:08:18,519 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 01:08:18,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 01:08:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-01 01:08:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:08:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-01 01:08:18,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-01 01:08:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:18,525 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-01 01:08:18,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:08:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-01 01:08:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:08:18,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:18,526 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-01 01:08:18,527 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:18,527 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:18,527 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-10-01 01:08:18,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:18,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:18,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:18,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:18,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:18,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:18,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:18,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:18,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 01:08:18,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:18,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:18,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:18,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:08:18,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:08:18,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:08:18,677 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:18,678 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-01 01:08:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:18,820 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-10-01 01:08:18,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:08:18,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-01 01:08:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:18,821 INFO L225 Difference]: With dead ends: 18 [2018-10-01 01:08:18,821 INFO L226 Difference]: Without dead ends: 16 [2018-10-01 01:08:18,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-01 01:08:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-10-01 01:08:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 01:08:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-01 01:08:18,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-01 01:08:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:18,829 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-01 01:08:18,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:08:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-01 01:08:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:08:18,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:18,830 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-01 01:08:18,830 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:18,830 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-10-01 01:08:18,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:18,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:18,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:18,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:18,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:18,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:18,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:18,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:18,901 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:18,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:18,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:18,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:18,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:08:18,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:08:18,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:08:18,959 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:18,959 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-10-01 01:08:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:19,124 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-01 01:08:19,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:08:19,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-01 01:08:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:19,125 INFO L225 Difference]: With dead ends: 19 [2018-10-01 01:08:19,125 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 01:08:19,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 01:08:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-01 01:08:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:08:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-01 01:08:19,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-01 01:08:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:19,130 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-01 01:08:19,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:08:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-01 01:08:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:08:19,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:19,131 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-01 01:08:19,131 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:19,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-10-01 01:08:19,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:19,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:19,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:19,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:19,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:19,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:19,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:19,217 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:19,232 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-01 01:08:19,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:19,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:19,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:19,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:08:19,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:08:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:08:19,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:19,285 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-01 01:08:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:19,345 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-10-01 01:08:19,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:08:19,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-01 01:08:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:19,350 INFO L225 Difference]: With dead ends: 18 [2018-10-01 01:08:19,350 INFO L226 Difference]: Without dead ends: 16 [2018-10-01 01:08:19,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:19,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-01 01:08:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-10-01 01:08:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 01:08:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-01 01:08:19,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-01 01:08:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:19,355 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-01 01:08:19,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:08:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-01 01:08:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:08:19,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:19,356 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-01 01:08:19,356 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:19,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:19,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-10-01 01:08:19,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:19,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:19,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:19,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:19,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:19,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:19,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:19,420 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:19,425 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-01 01:08:19,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:19,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:19,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:19,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:08:19,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:08:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:08:19,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:19,474 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-10-01 01:08:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:19,702 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-01 01:08:19,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:08:19,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-01 01:08:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:19,704 INFO L225 Difference]: With dead ends: 23 [2018-10-01 01:08:19,704 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 01:08:19,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 01:08:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-10-01 01:08:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:08:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-01 01:08:19,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-10-01 01:08:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:19,711 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-01 01:08:19,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:08:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-01 01:08:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:08:19,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:19,712 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-01 01:08:19,712 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:19,713 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:19,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-10-01 01:08:19,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:19,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:19,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:19,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:19,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:19,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:19,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:19,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:19,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:19,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:19,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:08:19,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:08:19,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:08:19,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:19,824 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-10-01 01:08:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:19,909 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-01 01:08:19,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:08:19,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-01 01:08:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:19,910 INFO L225 Difference]: With dead ends: 23 [2018-10-01 01:08:19,910 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 01:08:19,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 01:08:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-10-01 01:08:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:08:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-01 01:08:19,917 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-01 01:08:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:19,917 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-01 01:08:19,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:08:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-01 01:08:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:08:19,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:19,918 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-01 01:08:19,918 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:19,918 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-10-01 01:08:19,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:19,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:19,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:19,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:19,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:19,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:19,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:19,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:19,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:19,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:19,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:20,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:20,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:08:20,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:08:20,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:08:20,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:20,026 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-01 01:08:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:20,101 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-10-01 01:08:20,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:08:20,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-01 01:08:20,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:20,106 INFO L225 Difference]: With dead ends: 21 [2018-10-01 01:08:20,106 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 01:08:20,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 01:08:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-10-01 01:08:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:08:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-01 01:08:20,112 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-10-01 01:08:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:20,112 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-01 01:08:20,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:08:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-01 01:08:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:08:20,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:20,113 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-10-01 01:08:20,113 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:20,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:20,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-10-01 01:08:20,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:20,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:20,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:20,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:20,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:20,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:20,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:20,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:20,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 01:08:20,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:20,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:20,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:20,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:08:20,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:08:20,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:08:20,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:20,226 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-10-01 01:08:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:20,298 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-10-01 01:08:20,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:08:20,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-01 01:08:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:20,302 INFO L225 Difference]: With dead ends: 20 [2018-10-01 01:08:20,302 INFO L226 Difference]: Without dead ends: 18 [2018-10-01 01:08:20,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-01 01:08:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-10-01 01:08:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 01:08:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-01 01:08:20,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-01 01:08:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:20,308 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-01 01:08:20,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:08:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-01 01:08:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:20,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:20,309 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-10-01 01:08:20,309 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:20,309 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-10-01 01:08:20,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:20,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:20,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:20,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:20,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:20,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:20,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:20,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:20,411 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:20,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:20,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:20,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:20,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:20,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:20,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:20,512 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:20,512 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-10-01 01:08:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:20,583 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-01 01:08:20,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:20,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:20,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:20,584 INFO L225 Difference]: With dead ends: 25 [2018-10-01 01:08:20,585 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:08:20,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:08:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-01 01:08:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:20,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-01 01:08:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:20,592 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:20,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:20,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:20,593 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-01 01:08:20,593 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:20,593 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:20,594 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-10-01 01:08:20,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:20,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:20,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:20,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:20,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:20,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:20,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:20,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:20,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-01 01:08:20,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:20,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:20,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:20,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:20,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:20,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:20,726 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:20,727 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-01 01:08:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:20,929 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-01 01:08:20,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:20,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:20,931 INFO L225 Difference]: With dead ends: 25 [2018-10-01 01:08:20,931 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:08:20,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:08:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-01 01:08:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:08:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-01 01:08:20,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-01 01:08:20,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:20,939 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-01 01:08:20,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-01 01:08:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:20,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:20,940 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-01 01:08:20,940 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:20,940 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-10-01 01:08:20,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:20,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:20,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:20,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:20,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:20,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:20,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:21,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:21,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:21,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:21,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:21,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:21,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:21,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:21,106 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:21,106 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-01 01:08:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:21,216 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-01 01:08:21,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:21,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:21,216 INFO L225 Difference]: With dead ends: 23 [2018-10-01 01:08:21,217 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 01:08:21,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 01:08:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-01 01:08:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:21,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-01 01:08:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:21,224 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:21,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:21,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:21,225 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-01 01:08:21,225 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:21,225 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-10-01 01:08:21,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:21,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:21,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:21,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:21,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:21,327 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:21,334 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-01 01:08:21,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:21,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:21,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:21,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:21,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:21,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:21,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:21,383 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-01 01:08:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:21,649 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-10-01 01:08:21,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:21,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:21,651 INFO L225 Difference]: With dead ends: 22 [2018-10-01 01:08:21,651 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 01:08:21,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 01:08:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-10-01 01:08:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:08:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-01 01:08:21,659 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-01 01:08:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:21,659 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-01 01:08:21,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-01 01:08:21,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:21,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:21,660 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-01 01:08:21,660 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:21,661 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-10-01 01:08:21,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:21,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:21,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:21,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:21,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:21,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:21,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:21,725 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:21,733 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-01 01:08:21,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:21,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:21,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:21,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:21,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:21,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:21,781 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-10-01 01:08:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:21,971 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-01 01:08:21,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:21,971 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:21,972 INFO L225 Difference]: With dead ends: 25 [2018-10-01 01:08:21,972 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:08:21,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:08:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-01 01:08:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:21,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-01 01:08:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:21,980 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:21,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:21,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:21,981 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-01 01:08:21,981 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:21,982 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:21,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-10-01 01:08:21,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:21,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:21,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:21,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:21,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:22,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:22,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:22,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:22,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:22,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:22,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:22,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:22,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:22,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:22,140 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-01 01:08:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:22,276 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-01 01:08:22,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:22,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:22,277 INFO L225 Difference]: With dead ends: 25 [2018-10-01 01:08:22,277 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:08:22,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:08:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-01 01:08:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:08:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-01 01:08:22,285 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-01 01:08:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:22,285 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-01 01:08:22,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-01 01:08:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:22,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:22,286 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-01 01:08:22,286 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:22,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-10-01 01:08:22,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:22,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:22,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:22,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:22,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:22,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:22,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:22,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:22,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:22,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:22,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:22,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:22,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:22,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:22,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:22,396 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-01 01:08:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:22,635 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-01 01:08:22,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:22,638 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:22,639 INFO L225 Difference]: With dead ends: 23 [2018-10-01 01:08:22,639 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 01:08:22,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 01:08:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-01 01:08:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:22,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-01 01:08:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:22,647 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:22,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:22,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:22,647 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-01 01:08:22,647 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:22,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-10-01 01:08:22,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:22,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:22,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:22,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:22,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:22,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:22,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:22,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:22,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-01 01:08:22,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:22,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:22,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:22,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:22,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:22,755 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:22,755 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-01 01:08:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:22,912 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-10-01 01:08:22,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:22,912 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:22,913 INFO L225 Difference]: With dead ends: 22 [2018-10-01 01:08:22,913 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 01:08:22,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 01:08:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-10-01 01:08:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:08:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-01 01:08:22,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-01 01:08:22,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:22,920 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-01 01:08:22,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-01 01:08:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:22,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:22,920 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-01 01:08:22,920 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:22,920 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:22,921 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-10-01 01:08:22,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:22,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:22,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:22,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:22,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:22,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:22,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:22,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:22,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:22,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:22,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:23,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:23,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:23,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:23,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:23,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:23,030 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-10-01 01:08:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:23,097 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:23,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:23,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:23,099 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:23,099 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:23,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-01 01:08:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:23,108 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-01 01:08:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:23,108 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:23,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:23,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:23,109 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-01 01:08:23,109 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:23,109 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-10-01 01:08:23,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:23,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:23,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:23,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:23,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:23,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:23,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:23,368 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:23,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-01 01:08:23,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:23,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:23,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:23,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:23,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:23,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:23,435 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-01 01:08:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:23,529 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-01 01:08:23,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:23,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:23,530 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:08:23,530 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:08:23,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:08:23,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:08:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-10-01 01:08:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:23,540 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-01 01:08:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:23,540 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:23,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:23,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:23,541 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-01 01:08:23,541 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:23,541 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:23,541 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-10-01 01:08:23,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:23,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:23,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:23,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:23,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:23,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:23,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:23,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:23,651 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-01 01:08:23,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:23,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:23,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:23,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:23,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:23,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:23,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:23,900 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-01 01:08:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:24,058 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:24,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:24,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:24,059 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:24,059 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:24,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:08:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-01 01:08:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:24,068 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-01 01:08:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:24,068 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:24,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:24,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:24,069 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-01 01:08:24,070 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:24,070 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-10-01 01:08:24,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:24,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:24,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:24,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:24,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:24,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:24,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:24,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:24,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:24,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:24,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:24,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:24,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:24,221 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-01 01:08:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:24,351 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-01 01:08:24,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:24,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:24,352 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:08:24,352 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:08:24,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:08:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-10-01 01:08:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:08:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-01 01:08:24,360 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-01 01:08:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:24,360 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-01 01:08:24,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-01 01:08:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:24,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:24,361 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-01 01:08:24,361 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:24,362 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:24,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-10-01 01:08:24,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:24,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:24,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:24,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:24,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:24,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:24,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:24,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:24,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:24,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:24,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:24,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:24,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:24,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:24,458 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-01 01:08:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:24,534 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-01 01:08:24,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:24,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:24,535 INFO L225 Difference]: With dead ends: 27 [2018-10-01 01:08:24,535 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 01:08:24,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 01:08:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-10-01 01:08:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:24,547 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-01 01:08:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:24,548 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:24,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:24,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:24,548 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-01 01:08:24,549 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:24,549 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-10-01 01:08:24,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:24,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:24,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:24,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:24,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:24,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:24,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:24,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-01 01:08:24,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:24,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:24,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:24,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:24,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:24,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:24,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:24,663 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-01 01:08:24,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:24,804 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-01 01:08:24,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:24,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:24,805 INFO L225 Difference]: With dead ends: 27 [2018-10-01 01:08:24,805 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 01:08:24,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 01:08:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-10-01 01:08:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:24,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-01 01:08:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:24,815 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:24,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:24,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:24,816 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-01 01:08:24,816 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:24,816 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-10-01 01:08:24,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:24,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:24,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:24,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:24,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:24,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:24,883 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:24,909 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:24,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:24,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:25,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:25,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:25,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:25,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:25,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:25,008 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-01 01:08:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:25,082 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-01 01:08:25,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:25,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:25,084 INFO L225 Difference]: With dead ends: 25 [2018-10-01 01:08:25,084 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:08:25,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:08:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-10-01 01:08:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:25,095 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-01 01:08:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:25,095 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:25,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:08:25,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:25,096 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-10-01 01:08:25,096 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:25,096 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-10-01 01:08:25,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:25,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:25,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:25,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:25,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:25,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:25,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:25,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:25,196 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:25,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:25,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:25,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:25,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:08:25,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:08:25,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:08:25,271 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:25,271 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-01 01:08:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:25,369 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-10-01 01:08:25,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:08:25,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-01 01:08:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:25,371 INFO L225 Difference]: With dead ends: 24 [2018-10-01 01:08:25,371 INFO L226 Difference]: Without dead ends: 22 [2018-10-01 01:08:25,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-01 01:08:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-10-01 01:08:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:08:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-01 01:08:25,378 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-01 01:08:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:25,378 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-01 01:08:25,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:08:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-01 01:08:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:25,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:25,379 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-10-01 01:08:25,379 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:25,380 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-10-01 01:08:25,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:25,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:25,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:25,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:25,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:25,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:25,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:25,452 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:25,527 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 01:08:25,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:25,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:25,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:25,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:25,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:25,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:25,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:25,765 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-10-01 01:08:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:25,863 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:25,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:25,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:25,864 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:25,864 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:25,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:08:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-01 01:08:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:25,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:25,877 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:25,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:25,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:25,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:25,877 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:25,878 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:25,878 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-10-01 01:08:25,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:25,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:25,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:25,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:25,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:25,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:25,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:25,938 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:25,948 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 01:08:25,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:25,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:25,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:25,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:25,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:25,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:25,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:25,998 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:26,096 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:26,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:26,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:26,097 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:26,097 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:26,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-01 01:08:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:26,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-01 01:08:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:26,112 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:26,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:26,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:26,113 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:26,113 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:26,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-10-01 01:08:26,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:26,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:26,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:26,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:26,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:26,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:26,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:26,175 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:26,183 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-01 01:08:26,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:26,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:26,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:26,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:26,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:26,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:26,252 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-01 01:08:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:26,396 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:26,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:26,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:26,397 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:26,398 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:26,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-01 01:08:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:26,411 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:26,412 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:26,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:26,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:26,413 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:26,413 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:26,413 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-10-01 01:08:26,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:26,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:26,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:26,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:26,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:26,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:26,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:26,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:26,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:26,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:26,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:26,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:26,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:26,541 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:26,710 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:26,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:26,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:26,711 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:26,712 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:26,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-10-01 01:08:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:26,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-01 01:08:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:26,723 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:26,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:26,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:26,724 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:26,724 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:26,724 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:26,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-10-01 01:08:26,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:26,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:26,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:26,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:26,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:26,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:26,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:26,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:26,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:26,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:26,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:26,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:26,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:26,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:26,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:26,825 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-01 01:08:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:26,984 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-01 01:08:26,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:26,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:26,985 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:08:26,986 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:08:26,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:26,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:08:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-10-01 01:08:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:26,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:26,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:26,998 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:26,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:26,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:26,999 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:26,999 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:26,999 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:26,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-10-01 01:08:26,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:26,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:27,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:27,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:27,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:27,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:27,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:27,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:27,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 01:08:27,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:27,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:27,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:27,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:27,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:27,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:27,107 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:27,190 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-01 01:08:27,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:27,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:27,192 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:08:27,192 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:08:27,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:08:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-01 01:08:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:27,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-01 01:08:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:27,206 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:27,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:27,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:27,207 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:27,207 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:27,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-10-01 01:08:27,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:27,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:27,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:27,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:27,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:27,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:27,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:27,280 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:27,284 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:27,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:27,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:27,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:27,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:27,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:27,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:27,335 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-01 01:08:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:27,414 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-01 01:08:27,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:27,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:27,415 INFO L225 Difference]: With dead ends: 27 [2018-10-01 01:08:27,415 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 01:08:27,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 01:08:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-01 01:08:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:27,431 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:27,431 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:27,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:27,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:27,432 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:27,432 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:27,432 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-10-01 01:08:27,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:27,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:27,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:27,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:27,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:27,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:27,905 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) [2018-10-01 01:08:27,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:28,003 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 01:08:28,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:28,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:28,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:28,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:28,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:28,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:28,146 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:28,147 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:28,232 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-10-01 01:08:28,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:28,232 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:28,233 INFO L225 Difference]: With dead ends: 26 [2018-10-01 01:08:28,233 INFO L226 Difference]: Without dead ends: 24 [2018-10-01 01:08:28,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:08:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-01 01:08:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-10-01 01:08:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:08:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-01 01:08:28,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-01 01:08:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:28,246 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-01 01:08:28,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-01 01:08:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:28,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:28,247 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:28,247 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:28,247 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-10-01 01:08:28,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:28,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:28,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:28,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:28,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:28,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:28,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:28,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:28,332 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-01 01:08:28,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:28,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:28,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:28,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:28,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:28,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:28,394 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-10-01 01:08:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:28,479 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:28,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:28,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:28,480 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:28,481 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:28,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-01 01:08:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:28,497 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:28,497 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:28,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:28,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:28,497 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:28,497 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:28,497 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-10-01 01:08:28,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:28,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:28,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:28,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:28,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:28,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:28,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:28,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:28,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:28,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:28,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:28,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:28,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:28,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:28,608 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:28,874 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:28,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:28,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:28,875 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:28,875 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:28,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-01 01:08:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:28,889 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-01 01:08:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:28,889 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:28,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:28,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:28,890 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:28,890 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:28,890 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:28,890 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-10-01 01:08:28,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:28,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:28,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:28,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:28,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:28,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:28,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:28,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:28,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:28,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:28,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:29,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:29,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:29,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:29,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:29,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:29,028 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-01 01:08:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:29,185 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:29,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:29,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:29,185 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:29,185 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:29,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:29,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-01 01:08:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:29,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:29,200 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:29,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:29,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:29,200 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:29,200 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:29,201 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-10-01 01:08:29,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:29,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:29,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:29,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:29,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:29,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:29,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:29,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:29,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 01:08:29,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:29,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:29,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:29,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:29,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:29,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:29,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:29,396 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:29,537 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:29,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:29,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:29,539 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:29,539 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:29,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-10-01 01:08:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:29,552 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-01 01:08:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:29,552 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:29,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:29,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:29,553 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:29,553 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:29,553 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-10-01 01:08:29,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:29,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:29,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:29,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:29,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:29,638 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:29,643 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:29,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:29,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:29,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:29,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:29,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:29,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:29,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:29,683 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-01 01:08:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:29,772 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-01 01:08:29,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:29,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:29,773 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:08:29,773 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:08:29,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:08:29,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-10-01 01:08:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:29,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:29,788 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:29,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:29,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:29,789 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:29,789 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:29,789 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-10-01 01:08:29,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:29,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:29,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:29,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:29,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:29,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:29,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:29,930 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:29,936 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 01:08:29,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:29,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:29,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:29,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:29,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:29,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:29,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:29,976 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:30,068 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-01 01:08:30,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:30,069 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:30,069 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:08:30,069 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:08:30,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:08:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-01 01:08:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:30,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-01 01:08:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:30,085 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:30,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:30,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:30,085 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:30,086 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:30,086 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:30,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-10-01 01:08:30,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:30,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:30,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:30,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:30,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:30,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:30,132 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:30,139 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-01 01:08:30,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:30,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:30,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:30,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:30,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:30,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:30,201 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-01 01:08:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:30,297 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-01 01:08:30,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:30,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:30,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:30,298 INFO L225 Difference]: With dead ends: 27 [2018-10-01 01:08:30,298 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 01:08:30,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 01:08:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-01 01:08:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:30,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:30,314 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:30,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:30,314 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:30,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:30,314 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:30,314 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:30,315 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-10-01 01:08:30,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:30,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:30,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:30,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:30,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:30,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:30,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:30,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:30,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:30,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:30,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:30,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:30,442 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:30,557 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-10-01 01:08:30,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:30,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:30,558 INFO L225 Difference]: With dead ends: 26 [2018-10-01 01:08:30,558 INFO L226 Difference]: Without dead ends: 24 [2018-10-01 01:08:30,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-01 01:08:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-10-01 01:08:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:08:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-01 01:08:30,569 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-01 01:08:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:30,569 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-01 01:08:30,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-01 01:08:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:30,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:30,570 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:30,570 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:30,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:30,570 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-10-01 01:08:30,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:30,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:30,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:30,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:30,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:30,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:30,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:30,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:30,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:30,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:30,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:30,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:30,669 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:30,669 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-10-01 01:08:30,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:30,773 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:30,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:30,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:30,774 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:30,774 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:30,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-01 01:08:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:30,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-01 01:08:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:30,797 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:30,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:30,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:30,798 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:30,798 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:30,798 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-10-01 01:08:30,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:30,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:30,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:30,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:30,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:30,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:30,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:30,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 01:08:30,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:30,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:30,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:30,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:30,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:30,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:30,926 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-01 01:08:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:31,050 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:31,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:31,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:31,051 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:31,051 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:31,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-01 01:08:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:31,074 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:31,074 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:31,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:31,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:31,074 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:31,075 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:31,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:31,075 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-10-01 01:08:31,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:31,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:31,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:31,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:31,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:31,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:31,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:31,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:31,131 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:31,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:31,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:31,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:31,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:31,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:31,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:31,186 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:31,354 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:31,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:31,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:31,355 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:31,355 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:31,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-01 01:08:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:31,378 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-01 01:08:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:31,378 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:31,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:31,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:31,379 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:31,379 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:31,380 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:31,380 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-10-01 01:08:31,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:31,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:31,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:31,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:31,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:31,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:31,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:31,457 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:31,464 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 01:08:31,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:31,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:31,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:31,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:31,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:31,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:31,515 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-01 01:08:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:31,635 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:08:31,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:31,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:31,636 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:08:31,636 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:08:31,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:08:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-10-01 01:08:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:31,655 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-01 01:08:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:31,655 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:31,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:31,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:31,656 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:31,656 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:31,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:31,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-10-01 01:08:31,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:31,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:31,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:31,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:31,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:31,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:31,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:31,722 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:31,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-01 01:08:31,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:31,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:31,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:31,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:31,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:31,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:31,779 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:31,779 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-01 01:08:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:31,925 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:31,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:31,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:31,925 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:31,925 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:31,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-01 01:08:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:31,944 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-01 01:08:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:31,945 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:31,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:31,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:31,945 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:31,945 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:31,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:31,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-10-01 01:08:31,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:31,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:31,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:31,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:31,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:32,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:32,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:32,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:32,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:32,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:32,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:32,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:32,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:32,096 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-01 01:08:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:32,215 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:32,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:32,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:32,216 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:32,216 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:32,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-01 01:08:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:32,236 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:32,236 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:32,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:32,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:32,237 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:32,237 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:32,237 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-10-01 01:08:32,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:32,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:32,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:32,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:32,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:32,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:32,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:32,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:32,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:32,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:32,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:32,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:32,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:32,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:32,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:32,381 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:32,491 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:32,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:32,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:32,492 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:32,492 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:32,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-01 01:08:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:32,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-01 01:08:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:32,513 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:32,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:32,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:32,514 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:32,514 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:32,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-10-01 01:08:32,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:32,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:32,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:32,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:32,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:32,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:32,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:32,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:32,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 01:08:32,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:32,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:32,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:32,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:32,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:32,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:32,651 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-01 01:08:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:32,755 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:08:32,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:32,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:32,756 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:08:32,756 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:08:32,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:08:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-10-01 01:08:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:32,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-01 01:08:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:32,773 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:32,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:32,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:32,774 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:32,774 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:32,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-10-01 01:08:32,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:32,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:32,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:32,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:32,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:32,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:32,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:32,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:32,850 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:32,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:32,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:32,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:32,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:32,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:32,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:32,922 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:32,923 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-01 01:08:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:33,024 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:08:33,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:33,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:33,025 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:08:33,025 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:08:33,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:08:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-01 01:08:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:33,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-01 01:08:33,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:33,048 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:33,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:33,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:33,048 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:33,048 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:33,048 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-10-01 01:08:33,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:33,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:33,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:33,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:33,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:33,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:33,107 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:33,114 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 01:08:33,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:33,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:33,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:33,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:33,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:33,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:33,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:33,188 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-01 01:08:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:33,297 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:33,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:33,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:33,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:33,298 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:33,298 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:33,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-01 01:08:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:33,321 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:33,321 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:33,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:33,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:33,322 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:33,322 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:33,322 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-10-01 01:08:33,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:33,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:33,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:33,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:33,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:33,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:33,369 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:33,374 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-01 01:08:33,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:33,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:33,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:33,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:33,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:33,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:33,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:33,439 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:33,557 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:08:33,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:33,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:33,558 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:08:33,558 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:08:33,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:08:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-01 01:08:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:33,582 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-01 01:08:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:33,583 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:33,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:33,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:33,583 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:33,584 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:33,584 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-10-01 01:08:33,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:33,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:33,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:33,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:33,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:33,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:33,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:33,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:33,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:33,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:33,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:33,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:33,682 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-01 01:08:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:33,899 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:33,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:33,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:33,900 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:33,900 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:33,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-10-01 01:08:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:33,920 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-01 01:08:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:33,921 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:33,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:33,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:33,921 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-01 01:08:33,921 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:33,922 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-10-01 01:08:33,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:33,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:33,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:33,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:33,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:33,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:33,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:33,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:33,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:33,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:34,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:34,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:34,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:34,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:34,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:34,093 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-01 01:08:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:34,219 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:34,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:34,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:34,220 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:34,220 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:34,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-10-01 01:08:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:34,243 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-01 01:08:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:34,244 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:34,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:34,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:34,244 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:34,244 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:34,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:34,245 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-10-01 01:08:34,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:34,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:34,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:34,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:34,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:34,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:34,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:34,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:34,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 01:08:34,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:34,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:34,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:34,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:34,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:34,371 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:34,371 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-01 01:08:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:34,544 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:34,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:34,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:34,545 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:34,545 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:34,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-01 01:08:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:34,569 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-01 01:08:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:34,569 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:34,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:34,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:34,570 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-01 01:08:34,570 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:34,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:34,570 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-10-01 01:08:34,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:34,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:34,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:34,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:34,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:34,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:34,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:34,638 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:34,643 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:34,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:34,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:34,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:34,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:34,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:34,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:34,682 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-01 01:08:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:34,785 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-01 01:08:34,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:34,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:34,786 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:08:34,786 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:08:34,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:08:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-01 01:08:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:34,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-01 01:08:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:34,813 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:34,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:08:34,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:34,813 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-10-01 01:08:34,813 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:34,814 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-10-01 01:08:34,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:34,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:34,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:34,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:34,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:34,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:34,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:34,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:34,887 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 01:08:34,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:34,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:34,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:34,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:08:34,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:08:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:08:34,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:34,928 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-01 01:08:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:35,025 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-10-01 01:08:35,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:08:35,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 01:08:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:35,026 INFO L225 Difference]: With dead ends: 28 [2018-10-01 01:08:35,026 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 01:08:35,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 01:08:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-10-01 01:08:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:08:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-01 01:08:35,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-01 01:08:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:35,045 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-01 01:08:35,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:08:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-01 01:08:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:35,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:35,045 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-10-01 01:08:35,045 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:35,045 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-10-01 01:08:35,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:35,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:35,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:35,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:35,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:35,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:35,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:35,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:35,114 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:35,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:35,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:35,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:35,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:35,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:35,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:35,179 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:35,179 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-10-01 01:08:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:35,321 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:35,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:35,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:35,323 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:35,323 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:35,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-01 01:08:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:35,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:35,357 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:35,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:35,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:35,357 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:35,358 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:35,358 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-10-01 01:08:35,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:35,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:35,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:35,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:35,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:35,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:35,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:35,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:35,424 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:35,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:35,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:35,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:35,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:35,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:35,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:35,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:35,487 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:35,652 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:35,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:35,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:35,653 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:35,654 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:35,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-01 01:08:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:35,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:35,688 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:35,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:35,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:35,688 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:35,688 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:35,689 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:35,689 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-10-01 01:08:35,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:35,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:35,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:35,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:35,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:35,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:35,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:35,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:35,796 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:35,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:35,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:35,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:35,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:35,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:35,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:35,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:35,873 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:36,011 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:36,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:36,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:36,012 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:36,012 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:36,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-01 01:08:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:36,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:36,045 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:36,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:36,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:36,046 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:36,046 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:36,046 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:36,046 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-10-01 01:08:36,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:36,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:36,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:36,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:36,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:36,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:36,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:36,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:36,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:36,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:36,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:36,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:36,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:36,250 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:36,250 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:36,389 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:36,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:36,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:36,390 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:36,390 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:36,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-10-01 01:08:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:36,420 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-01 01:08:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:36,420 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:36,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:36,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:36,421 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:36,421 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:36,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-10-01 01:08:36,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:36,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:36,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:36,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:36,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:36,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:36,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:36,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:36,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:36,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:36,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:36,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:36,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:36,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:36,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:36,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:36,575 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-01 01:08:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:36,721 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:36,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:36,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:36,722 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:36,722 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:36,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-01 01:08:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:36,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:36,757 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:36,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:36,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:36,757 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:36,758 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:36,758 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:36,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-10-01 01:08:36,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:36,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:36,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:36,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:36,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:37,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:37,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:37,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:37,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:37,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:37,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:37,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:37,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:37,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:37,335 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:37,335 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:37,486 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:37,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:37,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:37,487 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:37,487 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:37,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:08:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-01 01:08:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:37,520 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:37,520 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:37,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:37,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:37,521 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:37,521 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:37,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-10-01 01:08:37,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:37,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:37,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:37,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:37,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:37,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:37,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:37,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:37,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:37,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:37,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:37,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:37,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:37,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:37,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:37,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:37,634 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:37,784 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:37,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:37,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:37,785 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:37,785 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:37,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-01 01:08:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:37,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:37,819 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:37,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:37,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:37,820 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:37,820 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:37,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:37,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-10-01 01:08:37,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:37,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:37,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:37,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:37,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:37,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:37,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:37,876 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:37,889 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:37,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:37,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:37,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:37,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:37,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:37,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:37,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:37,974 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:38,115 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:38,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:38,115 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:38,116 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:38,116 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:38,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-10-01 01:08:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:38,144 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-01 01:08:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:38,144 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:38,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:38,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:38,145 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:38,145 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:38,145 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:38,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-10-01 01:08:38,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:38,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:38,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:38,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:38,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:38,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:38,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:38,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:38,221 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:38,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:38,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:38,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:38,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:38,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:38,284 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:38,284 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-01 01:08:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:38,426 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:38,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:38,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:38,427 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:38,427 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:38,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-01 01:08:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:38,464 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:38,464 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:38,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:38,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:38,464 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:38,465 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:38,465 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-10-01 01:08:38,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:38,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:38,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:38,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:38,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:38,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:38,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:38,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:38,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:38,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:38,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:38,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:38,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:38,591 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:38,591 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:38,745 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:08:38,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:38,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:38,746 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:08:38,746 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:08:38,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:08:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-01 01:08:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:38,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:38,781 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:38,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:38,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:38,781 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:38,782 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:38,782 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-10-01 01:08:38,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:38,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:38,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:38,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:38,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:38,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:38,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:38,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:38,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:38,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:38,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:38,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:38,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:38,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:38,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:38,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:38,900 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:39,050 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:39,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:39,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:39,052 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:39,052 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:39,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:39,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-01 01:08:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:39,087 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:39,087 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:39,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:39,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:39,087 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:39,088 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:39,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:39,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-10-01 01:08:39,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:39,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:39,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:39,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:39,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:39,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:39,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:39,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:39,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:39,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:39,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:39,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:39,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:39,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:39,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:39,207 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:39,207 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:39,394 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:08:39,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:39,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:39,394 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:08:39,394 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:08:39,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:08:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-10-01 01:08:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:39,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-01 01:08:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:39,425 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:39,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:39,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:39,426 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:39,426 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:39,426 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-10-01 01:08:39,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:39,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:39,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:39,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:39,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:39,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:39,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:39,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:39,525 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:39,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:39,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:39,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:39,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:39,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:39,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:39,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:39,590 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-01 01:08:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:39,776 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:39,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:39,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:39,777 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:39,777 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:39,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-10-01 01:08:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:39,815 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:39,815 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:39,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:39,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:39,816 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:39,816 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:39,816 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-10-01 01:08:39,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:39,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:39,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:39,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:39,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:39,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:39,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:39,888 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:39,897 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:39,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:39,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:39,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:39,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:39,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:39,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:39,949 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:39,949 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:40,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:40,087 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:40,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:40,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:40,088 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:40,088 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:40,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-01 01:08:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:40,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:40,129 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:40,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:40,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:40,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:40,130 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:40,130 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:40,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:40,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-10-01 01:08:40,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:40,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:40,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:40,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:40,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:40,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:40,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:40,215 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:40,223 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:40,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:40,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:40,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:40,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:40,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:40,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:40,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:40,324 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:40,473 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:40,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:40,474 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:40,474 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:40,475 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:40,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-01 01:08:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:40,516 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:40,516 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:40,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:40,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:40,517 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:40,517 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:40,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-10-01 01:08:40,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:40,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:40,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:40,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:40,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:40,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:40,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:40,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:40,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:40,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:40,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:40,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:40,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:40,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:40,645 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:40,756 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-10-01 01:08:40,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:40,757 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:40,757 INFO L225 Difference]: With dead ends: 30 [2018-10-01 01:08:40,757 INFO L226 Difference]: Without dead ends: 28 [2018-10-01 01:08:40,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-01 01:08:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-01 01:08:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:40,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-01 01:08:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:40,783 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:40,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:40,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:40,783 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:40,784 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:40,784 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:40,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-10-01 01:08:40,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:40,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:40,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:40,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:40,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:40,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:40,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:40,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:40,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:40,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:40,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:40,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:40,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:40,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:40,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:40,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:40,911 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-10-01 01:08:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:41,090 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:41,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:41,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:41,091 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:41,091 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:41,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-01 01:08:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:41,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:41,134 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:41,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:41,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:41,134 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:41,135 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:41,135 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:41,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-10-01 01:08:41,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:41,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:41,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:41,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:41,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:41,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:41,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:41,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:41,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:41,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:41,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:41,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:41,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:41,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:41,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:41,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:41,243 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:41,420 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:41,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:41,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:41,422 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:41,422 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:41,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-01 01:08:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:41,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:41,462 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:41,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:41,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:41,463 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:41,463 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:41,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:41,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-10-01 01:08:41,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:41,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:41,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:41,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:41,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:41,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:41,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:41,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:41,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:41,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:41,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:41,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:41,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:41,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:41,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:41,594 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:41,764 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:41,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:41,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:41,765 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:41,765 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:41,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-01 01:08:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:41,806 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:41,806 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:41,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:41,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:41,807 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:41,807 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:41,807 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:41,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-10-01 01:08:41,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:41,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:41,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:41,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:41,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:41,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:41,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:41,871 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:41,878 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:41,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:41,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:41,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:41,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:41,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:41,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:41,934 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:42,105 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:42,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:42,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:42,106 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:42,106 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:42,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:42,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-10-01 01:08:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:42,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-01 01:08:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:42,146 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:42,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:42,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:42,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:42,146 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:42,146 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:42,146 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:42,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-10-01 01:08:42,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:42,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:42,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:42,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:42,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:42,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:42,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:42,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:42,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:42,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:42,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:42,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:42,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:42,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:42,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:42,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:42,292 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-01 01:08:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:42,468 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:42,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:42,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:42,469 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:42,469 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:42,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-01 01:08:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:42,513 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:42,513 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:42,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:42,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:42,513 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:42,513 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:42,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:42,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-10-01 01:08:42,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:42,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:42,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:42,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:42,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:42,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:42,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:42,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:42,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:42,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:42,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:42,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:42,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:42,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:42,654 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:42,838 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:42,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:42,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:42,839 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:42,839 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:42,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-01 01:08:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:42,882 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:42,882 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:42,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:42,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:42,883 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:42,883 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:42,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-10-01 01:08:42,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:42,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:42,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:42,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:42,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:42,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:42,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:42,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:42,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:42,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:43,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:43,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:43,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:43,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:43,004 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:43,004 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:43,183 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:43,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:43,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:43,184 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:43,184 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:43,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-01 01:08:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:43,229 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:43,230 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:43,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:43,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:43,230 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:43,231 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:43,231 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:43,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-10-01 01:08:43,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:43,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:43,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:43,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:43,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:43,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:43,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:43,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:43,288 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:43,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:43,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:43,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:43,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:43,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:43,339 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:43,339 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:43,510 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:43,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:43,510 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:43,511 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:43,511 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:43,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-10-01 01:08:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:43,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-01 01:08:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:43,546 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:43,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:43,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:43,546 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:43,546 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:43,546 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:43,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-10-01 01:08:43,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:43,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:43,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:43,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:43,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:43,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:43,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:43,597 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:43,603 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:43,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:43,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:43,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:43,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:43,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:43,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:43,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:43,661 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-01 01:08:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:43,824 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:43,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:43,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:43,825 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:43,825 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:43,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-01 01:08:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:43,869 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:43,869 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:43,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:43,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:43,870 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:43,870 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:43,870 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:43,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-10-01 01:08:43,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:43,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:43,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:43,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:43,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:43,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:43,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:43,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:43,932 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:43,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:43,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:44,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:44,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:44,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:44,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:44,012 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:44,012 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:44,170 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:08:44,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:44,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:44,171 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:08:44,171 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:08:44,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:08:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-01 01:08:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:44,222 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:44,222 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:44,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:44,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:44,222 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:44,223 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:44,223 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-10-01 01:08:44,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:44,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:44,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:44,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:44,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:44,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:44,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:44,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:44,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:44,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:44,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:44,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:44,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:44,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:44,339 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:44,339 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:44,553 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:08:44,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:44,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:44,553 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:08:44,554 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:08:44,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:08:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-01 01:08:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:44,632 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:44,632 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:44,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:44,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:44,633 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:44,633 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:44,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-10-01 01:08:44,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:44,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:44,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:44,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:44,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:44,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:44,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:44,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:44,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:44,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:44,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:44,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:44,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:44,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:44,782 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:45,009 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:08:45,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:45,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:45,010 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:08:45,010 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:08:45,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:08:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-10-01 01:08:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:45,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-01 01:08:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:45,048 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:45,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:45,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:45,048 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:45,048 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:45,048 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-10-01 01:08:45,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:45,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:45,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:45,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:45,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:45,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:45,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:45,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:45,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:45,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:45,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:45,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:45,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:45,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:45,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:45,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:45,345 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-01 01:08:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:45,493 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:45,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:45,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:45,495 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:45,495 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:45,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:08:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-10-01 01:08:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:45,539 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:45,539 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:45,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:45,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:45,540 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:45,540 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:45,540 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-10-01 01:08:45,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:45,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:45,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:45,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:45,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:45,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:45,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:45,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:45,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:45,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:45,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:45,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:45,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:45,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:45,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:45,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:45,663 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:45,816 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:08:45,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:45,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:45,817 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:08:45,817 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:08:45,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:08:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-01 01:08:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:45,867 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:45,867 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:45,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:45,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:45,867 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:45,867 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:45,868 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:45,868 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-10-01 01:08:45,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:45,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:45,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:45,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:45,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:45,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:45,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:45,931 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:45,935 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:45,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:45,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:45,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:45,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:45,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:45,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:45,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:45,998 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:46,163 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-01 01:08:46,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:46,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:46,164 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:08:46,164 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:08:46,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:08:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-01 01:08:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:46,210 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:46,210 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:46,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:46,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:46,211 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:46,211 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:46,211 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:46,211 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-10-01 01:08:46,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:46,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:46,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:46,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:46,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:46,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:46,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:46,331 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:46,339 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:46,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:46,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:46,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:46,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:46,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:46,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:46,380 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:46,518 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-10-01 01:08:46,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:46,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:46,519 INFO L225 Difference]: With dead ends: 30 [2018-10-01 01:08:46,519 INFO L226 Difference]: Without dead ends: 28 [2018-10-01 01:08:46,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-01 01:08:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-01 01:08:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:08:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:08:46,547 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-01 01:08:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:46,547 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:08:46,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:08:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:46,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:46,548 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:46,548 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:46,548 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:46,548 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-10-01 01:08:46,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:46,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:46,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:46,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:46,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:46,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:46,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:46,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:46,606 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:46,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:46,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:46,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:46,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:46,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:46,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:46,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:46,672 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-10-01 01:08:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:46,898 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:08:46,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:46,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:46,899 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:08:46,899 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:08:46,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:08:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:08:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:46,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:46,957 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:46,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:46,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:46,957 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:46,957 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:46,958 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-10-01 01:08:46,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:46,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:46,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:46,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:46,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:47,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:47,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:47,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:47,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:47,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:47,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:47,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:47,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:47,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:47,065 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:47,302 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:08:47,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:47,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:47,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:47,303 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:08:47,304 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:08:47,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:08:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-01 01:08:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:47,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:47,358 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:47,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:47,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:47,358 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:47,358 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:47,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-10-01 01:08:47,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:47,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:47,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:47,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:47,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:47,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:47,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:47,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:47,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:47,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:47,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:47,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:47,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:47,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:47,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:47,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:47,833 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:48,069 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:08:48,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:48,070 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:48,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:48,070 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:08:48,071 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:08:48,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:08:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:08:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:08:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:48,123 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:48,123 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:48,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:48,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:48,124 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:48,124 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:48,124 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-10-01 01:08:48,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:48,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:48,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:48,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:48,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:48,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:48,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:48,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:48,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:48,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:48,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:48,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:48,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:48,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:48,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:48,246 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:48,649 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:08:48,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:48,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:48,650 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:08:48,650 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:08:48,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:48,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:08:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-01 01:08:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:48,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:48,734 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:48,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:48,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:48,735 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:48,735 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:48,735 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-10-01 01:08:48,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:48,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:48,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:48,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:48,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:49,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:49,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:49,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:49,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:49,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:49,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:49,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:49,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:49,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:49,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:49,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:49,874 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:50,928 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:08:50,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:50,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:50,929 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:08:50,929 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:08:50,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 01:08:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:08:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 01:08:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:50,990 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:50,990 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:50,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:50,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:50,991 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:50,991 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:50,991 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-10-01 01:08:50,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:50,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:50,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:50,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:50,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:51,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:51,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:51,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:51,057 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:51,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:51,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:51,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:51,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:51,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:51,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:51,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:51,134 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:51,366 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:08:51,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:51,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:51,367 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:08:51,367 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:08:51,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:08:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-01 01:08:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:51,423 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:51,423 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:51,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:51,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:51,424 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:51,424 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:51,425 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-10-01 01:08:51,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:51,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:51,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:51,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:51,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:51,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:51,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:51,506 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:51,513 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:51,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:51,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:51,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:51,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:51,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:51,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:51,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:51,558 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:51,778 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:08:51,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:51,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:51,779 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:08:51,780 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:08:51,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:08:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-01 01:08:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:51,845 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:51,845 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:51,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:51,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:51,846 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:51,846 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:51,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-10-01 01:08:51,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:51,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:51,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:51,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:51,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:51,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:51,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:51,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:51,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:51,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:51,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:51,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:51,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:51,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:51,972 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:52,180 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:52,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:52,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:52,181 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:52,181 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:52,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-10-01 01:08:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:08:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:08:52,227 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-01 01:08:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:52,227 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:08:52,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:08:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:52,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:52,228 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:52,228 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:52,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-10-01 01:08:52,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:52,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:52,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:52,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:52,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:52,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:52,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:52,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:52,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:52,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:52,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:52,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:52,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:52,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:52,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:52,348 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-01 01:08:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:52,600 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:08:52,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:52,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:52,601 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:08:52,601 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:08:52,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:08:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:08:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:52,661 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:52,661 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:52,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:52,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:52,662 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:52,662 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:52,662 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:52,662 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-10-01 01:08:52,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:52,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:52,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:52,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:52,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:52,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:52,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:52,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:52,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:52,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:52,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:52,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:52,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:52,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:52,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:52,778 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:53,169 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:08:53,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:53,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:53,170 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:08:53,171 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:08:53,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:08:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-01 01:08:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:53,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:53,267 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:53,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:53,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:53,268 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:53,268 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:53,268 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-10-01 01:08:53,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:53,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:53,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:53,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:53,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:53,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:53,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:53,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:53,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:53,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:53,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:53,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:53,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:53,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:53,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:53,479 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:53,479 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:53,716 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:08:53,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:53,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:53,717 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:08:53,717 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:08:53,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:08:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:08:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:53,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:53,779 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:53,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:53,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:53,780 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:53,780 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:53,780 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-10-01 01:08:53,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:53,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:53,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:53,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:53,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:53,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:53,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:53,899 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:53,906 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:53,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:53,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:53,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:53,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:53,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:53,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:53,968 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:54,192 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:08:54,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:54,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:54,193 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:08:54,193 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:08:54,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:08:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-01 01:08:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:54,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:54,247 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:54,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:54,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:54,248 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:54,248 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:54,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-10-01 01:08:54,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:54,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:54,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:54,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:54,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:54,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:54,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:54,308 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:54,315 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:54,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:54,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:54,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:54,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:54,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:54,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:54,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:54,376 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:54,597 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:08:54,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:54,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:54,598 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:08:54,598 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:08:54,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:54,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:08:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 01:08:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:54,663 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:54,663 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:54,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:54,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:54,663 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:54,663 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:54,663 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:54,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-10-01 01:08:54,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:54,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:54,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:54,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:54,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:54,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:54,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:54,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:54,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:54,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:54,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:54,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:54,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:54,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:54,856 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:55,137 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:08:55,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:55,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:55,138 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:08:55,138 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:08:55,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:08:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:08:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-01 01:08:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:55,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:55,197 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:55,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:55,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:55,198 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:55,198 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:55,198 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:55,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-10-01 01:08:55,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:55,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:55,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:55,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:55,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:55,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:55,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:55,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:55,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:55,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:55,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:55,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:55,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:55,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:55,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:55,308 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:55,533 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:08:55,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:55,534 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:55,534 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:08:55,534 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:08:55,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:08:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-01 01:08:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:55,597 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:55,597 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:55,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:55,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:55,598 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:55,598 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:55,598 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-10-01 01:08:55,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:55,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:55,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:55,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:55,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:55,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:55,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:55,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:55,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:55,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:55,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:55,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:55,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:55,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:55,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:55,723 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:55,925 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:55,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:55,925 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:55,926 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:55,926 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:55,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-10-01 01:08:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:08:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:08:55,968 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-01 01:08:55,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:55,968 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:08:55,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:08:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:55,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:55,969 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:55,969 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:55,969 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-10-01 01:08:55,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:55,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:55,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:55,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:55,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:56,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:56,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:56,035 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:56,040 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:56,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:56,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:56,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:56,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:56,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:56,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:56,083 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-01 01:08:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:56,337 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:08:56,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:56,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:56,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:56,338 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:08:56,338 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:08:56,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:08:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-01 01:08:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:56,407 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:56,407 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:56,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:56,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:56,408 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:56,408 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:56,408 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:56,408 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-10-01 01:08:56,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:56,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:56,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:56,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:56,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:56,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:56,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:56,475 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:56,483 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:56,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:56,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:56,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:56,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:56,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:56,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:56,533 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:56,790 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:08:56,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:56,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:56,790 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:08:56,791 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:08:56,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:08:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-01 01:08:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:56,856 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:56,856 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:56,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:56,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:56,856 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:56,856 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:56,856 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-10-01 01:08:56,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:56,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:56,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:56,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:56,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:56,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:56,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:56,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:56,921 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:08:56,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:56,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:56,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:56,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:56,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:56,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:56,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:56,984 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:57,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:57,203 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:57,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:57,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:57,205 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:57,205 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:57,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-01 01:08:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:57,280 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:57,280 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:57,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:57,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:57,281 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:57,281 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:57,281 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-10-01 01:08:57,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:57,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:57,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:57,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:57,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:57,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:57,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:57,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:57,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:57,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:57,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:57,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:57,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:57,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:57,393 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:57,605 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:08:57,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:57,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:57,606 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:08:57,606 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:08:57,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:08:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-01 01:08:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:08:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:08:57,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:08:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:57,668 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:08:57,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:08:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:57,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:57,669 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:08:57,669 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:57,669 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-10-01 01:08:57,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:57,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:57,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:57,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:57,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:57,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:57,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:57,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:57,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:57,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:57,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:57,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:57,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:57,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:57,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:57,783 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:08:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:58,010 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:08:58,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:58,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:58,011 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:08:58,011 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:08:58,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:08:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-01 01:08:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:58,083 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:58,083 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:58,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:58,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:58,084 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:58,084 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:58,084 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:58,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-10-01 01:08:58,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:58,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:58,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:58,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:58,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:58,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:58,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:58,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:08:58,143 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:08:58,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:58,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:58,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:58,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:58,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:58,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:58,212 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:08:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:58,440 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:08:58,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:58,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:58,441 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:08:58,441 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:08:58,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:08:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-01 01:08:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:08:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:08:58,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:08:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:58,506 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:08:58,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:08:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:58,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:58,507 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:08:58,507 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:58,507 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-10-01 01:08:58,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:58,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:58,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:58,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:58,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:58,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:58,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:58,578 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:08:58,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:08:58,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:58,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:58,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:58,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:58,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:58,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:58,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:58,644 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:08:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:58,869 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:08:58,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:08:58,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:08:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:58,870 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:08:58,870 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:08:58,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:08:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:08:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-01 01:08:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:08:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:08:58,941 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:08:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:58,941 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:08:58,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:08:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:08:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:08:58,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:58,942 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:08:58,942 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:58,942 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:58,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-10-01 01:08:58,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:58,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:58,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:58,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:58,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:58,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:58,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:59,007 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:08:59,014 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:08:59,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:59,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:59,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:59,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:08:59,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:08:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:08:59,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:59,249 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:09:00,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:00,248 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:09:00,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:00,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:00,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:00,249 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:09:00,249 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:09:00,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:09:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:09:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-01 01:09:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:09:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:09:00,305 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-01 01:09:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:00,305 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:09:00,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:09:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:09:00,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:00,305 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-01 01:09:00,306 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:00,306 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-10-01 01:09:00,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:00,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:00,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:00,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:00,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:00,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:00,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:00,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:00,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:09:00,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:00,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:00,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:00,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:09:00,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:09:00,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:09:00,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:00,414 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-01 01:09:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:00,622 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:09:00,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:00,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:00,622 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:09:00,623 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:09:00,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:09:00,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-01 01:09:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:00,732 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:09:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:00,732 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:00,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:09:00,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:00,733 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:09:00,733 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:00,733 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-10-01 01:09:00,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:00,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:00,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:00,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:00,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:01,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:01,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:01,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:01,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:01,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:01,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:09:01,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:09:01,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:09:01,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:01,163 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:09:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:01,361 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:09:01,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:01,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:01,362 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:09:01,362 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:09:01,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:09:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:09:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-01 01:09:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:01,462 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:09:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:01,463 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:01,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:09:01,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:01,463 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:09:01,463 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:01,464 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:01,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-10-01 01:09:01,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:01,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:01,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:01,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:01,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:01,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:01,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:01,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:01,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:01,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:01,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:01,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:01,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:09:01,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:09:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:09:01,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:01,623 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:09:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:01,873 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:09:01,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:01,873 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:01,873 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:09:01,874 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:09:01,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:09:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-01 01:09:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:01,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:09:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:01,947 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:01,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:09:01,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:01,948 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:09:01,948 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:01,948 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:01,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-10-01 01:09:01,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:01,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:01,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:01,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:01,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:01,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:01,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:02,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:02,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:09:02,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:02,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:02,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:02,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:09:02,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:09:02,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:09:02,071 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:02,071 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:09:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:02,290 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:09:02,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:02,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:02,291 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:09:02,291 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:09:02,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:09:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-01 01:09:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:09:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:09:02,367 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-01 01:09:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:02,367 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:09:02,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:09:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:09:02,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:02,368 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-01 01:09:02,368 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:02,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:02,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-10-01 01:09:02,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:02,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:02,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:02,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:02,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:02,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:02,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:02,423 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:02,428 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:02,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:02,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:02,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:02,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:09:02,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:09:02,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:09:02,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:02,476 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-01 01:09:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:02,671 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:09:02,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:02,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:02,672 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:09:02,672 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:09:02,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:09:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-10-01 01:09:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:02,747 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:09:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:02,747 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:02,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:09:02,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:02,747 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:09:02,748 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:02,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:02,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-10-01 01:09:02,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:02,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:02,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:02,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:02,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:02,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:02,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:02,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:02,813 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:09:02,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:02,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:02,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:02,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:09:02,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:09:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:09:02,858 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:02,858 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:09:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:03,086 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:09:03,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:03,086 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:03,087 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:09:03,087 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:09:03,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:09:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-10-01 01:09:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:03,158 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-01 01:09:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:03,158 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:03,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:09:03,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:03,159 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-01 01:09:03,159 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:03,159 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-10-01 01:09:03,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:03,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:03,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:03,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:03,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:03,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:03,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:03,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:03,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:09:03,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:03,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:03,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:03,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:09:03,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:09:03,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:09:03,283 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:03,283 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-01 01:09:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:03,475 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-01 01:09:03,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:03,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:03,476 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:09:03,476 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:09:03,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:09:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-01 01:09:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:03,582 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-01 01:09:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:03,583 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:03,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:09:03,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:03,583 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-10-01 01:09:03,583 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:03,584 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:03,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-10-01 01:09:03,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:03,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:03,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:03,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:03,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:03,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:03,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:03,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:03,672 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:09:03,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:03,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:03,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:03,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:09:03,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:09:03,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:09:03,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:03,728 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-01 01:09:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:03,908 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-10-01 01:09:03,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:09:03,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-01 01:09:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:03,909 INFO L225 Difference]: With dead ends: 32 [2018-10-01 01:09:03,909 INFO L226 Difference]: Without dead ends: 30 [2018-10-01 01:09:03,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-01 01:09:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-10-01 01:09:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:09:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-01 01:09:03,958 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-01 01:09:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:03,958 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-01 01:09:03,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:09:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-01 01:09:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:03,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:03,958 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-10-01 01:09:03,959 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:03,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-10-01 01:09:03,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:03,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:03,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:03,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:03,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:04,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:04,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:04,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:04,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:04,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:04,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:04,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:04,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:04,183 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-10-01 01:09:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:04,614 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:04,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:04,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:04,617 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:04,617 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:04,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:04,707 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:04,708 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:04,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:04,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:04,708 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:09:04,708 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:04,709 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-10-01 01:09:04,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:04,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:04,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:04,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:04,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:04,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:04,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:04,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:04,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:04,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:04,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:04,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:04,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:04,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:04,845 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:05,160 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:05,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:05,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:05,160 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:05,160 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:05,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:09:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:05,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:05,278 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:05,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:05,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:05,279 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:09:05,279 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:05,279 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-10-01 01:09:05,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:05,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:05,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:05,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:05,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:05,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:05,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:05,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:05,379 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:05,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:05,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:05,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:05,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:05,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:05,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:05,434 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:05,755 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:05,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:05,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:05,756 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:05,756 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:05,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:05,851 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:05,852 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:05,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:05,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:05,852 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:05,852 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:05,852 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-10-01 01:09:05,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:05,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:05,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:05,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:05,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:05,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:05,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:05,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:05,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:05,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:05,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:05,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:05,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:05,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:05,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:05,974 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:06,276 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:06,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:06,276 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:06,277 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:06,277 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:06,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:06,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-01 01:09:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:06,359 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:06,360 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:06,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:06,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:06,360 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:09:06,360 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:06,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-10-01 01:09:06,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:06,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:06,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:06,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:06,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:06,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:06,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:06,421 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:06,427 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:06,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:06,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:06,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:06,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:06,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:06,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:06,481 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:06,809 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:06,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:06,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:06,810 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:06,810 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:06,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-01 01:09:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:06,906 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:06,907 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:06,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:06,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:06,907 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:06,907 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:06,907 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:06,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-10-01 01:09:06,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:06,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:06,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:06,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:06,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:06,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:06,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:07,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:07,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:07,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:07,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:07,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:07,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:07,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:07,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:07,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:07,077 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:07,375 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:07,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:07,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:07,376 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:07,376 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:07,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-01 01:09:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:07,467 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:07,467 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:07,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:07,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:07,468 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:07,468 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:07,468 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:07,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-10-01 01:09:07,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:07,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:07,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:07,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:07,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:07,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:07,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:07,590 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:07,598 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:07,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:07,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:07,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:07,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:07,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:07,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:07,641 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:07,642 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:07,929 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:07,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:07,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:07,930 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:07,930 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:07,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:09:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:08,019 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:08,019 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:08,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:08,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:08,020 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:08,020 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:08,020 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-10-01 01:09:08,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:08,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:08,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:08,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:08,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:08,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:08,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:08,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:08,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:08,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:08,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:08,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:08,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:08,136 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:08,410 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:09:08,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:08,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:08,411 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:09:08,411 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:09:08,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:09:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-01 01:09:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:09:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:09:08,488 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-01 01:09:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:08,489 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:09:08,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:09:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:08,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:08,489 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:09:08,489 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:08,490 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:08,490 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-10-01 01:09:08,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:08,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:08,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:08,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:08,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:08,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:08,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:08,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:08,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:08,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:08,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:08,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:08,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:08,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:08,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:08,620 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-01 01:09:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:08,944 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:08,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:08,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:08,944 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:08,944 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:08,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:09,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:09,034 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:09,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:09,035 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:09,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:09,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:09,035 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:09,035 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:09,035 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:09,035 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-10-01 01:09:09,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:09,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:09,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:09,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:09,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:09,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:09,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:09,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:09,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:09,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:09,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:09,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:09,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:09,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:09,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:09,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:09,231 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:09,538 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:09,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:09,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:09,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:09,539 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:09,539 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:09,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:09:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:09,629 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:09,629 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:09,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:09,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:09,630 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:09,630 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:09,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-10-01 01:09:09,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:09,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:09,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:09,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:09,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:09,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:09,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:09,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:09,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:09,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:09,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:09,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:09,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:09,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:09,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:09,776 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:10,100 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:10,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:10,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:10,100 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:10,100 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:10,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:10,190 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:10,190 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:10,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:10,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:10,190 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:10,190 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:10,190 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-10-01 01:09:10,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:10,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:10,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:10,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:10,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:10,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:10,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:10,265 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:10,275 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:10,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:10,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:10,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:10,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:10,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:10,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:10,359 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:10,694 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:10,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:10,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:10,694 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:10,694 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:10,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-01 01:09:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:10,784 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:10,784 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:10,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:10,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:10,784 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:10,784 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:10,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-10-01 01:09:10,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:10,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:10,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:10,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:10,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:10,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:10,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:10,930 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:10,938 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:10,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:10,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:11,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:11,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:11,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:11,004 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:11,004 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:11,316 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:11,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:11,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:11,317 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:11,317 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:11,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-01 01:09:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:11,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:11,416 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:11,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:11,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:11,417 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:11,417 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:11,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-10-01 01:09:11,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:11,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:11,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:11,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:11,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:12,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:12,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:12,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:12,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:12,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:12,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:12,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:12,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:12,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:12,416 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:12,719 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:12,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:12,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:12,720 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:12,720 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:12,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:09:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-01 01:09:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:12,816 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:12,816 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:12,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:12,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:12,817 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:12,817 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:12,817 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-10-01 01:09:12,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:12,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:12,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:12,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:12,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:12,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:12,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:12,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:12,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:12,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:12,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:12,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:12,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:12,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:12,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:12,939 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:12,939 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:13,247 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:13,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:13,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:13,248 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:13,248 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:13,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:09:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:13,351 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:13,351 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:13,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:13,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:13,351 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:13,351 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:13,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:13,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-10-01 01:09:13,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:13,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:13,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:13,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:13,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:13,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:13,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:13,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:13,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:13,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:13,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:13,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:13,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:13,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:13,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:13,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:13,476 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:13,762 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:09:13,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:13,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:13,763 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:09:13,763 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:09:13,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:09:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-10-01 01:09:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:09:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:09:13,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-01 01:09:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:13,841 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:09:13,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:09:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:13,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:13,841 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:09:13,841 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:13,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-10-01 01:09:13,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:13,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:13,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:13,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:13,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:13,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:13,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:13,897 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:13,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:13,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:13,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:13,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:13,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:13,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:13,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:13,957 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-01 01:09:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:14,260 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:14,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:14,260 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:14,261 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:14,261 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:14,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:09:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:14,367 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:14,367 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:14,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:14,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:14,367 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:14,367 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:14,367 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-10-01 01:09:14,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:14,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:14,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:14,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:14,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:14,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:14,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:14,426 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:14,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:14,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:14,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:14,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:14,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:14,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:14,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:14,537 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:14,538 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:14,841 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:14,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:14,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:14,842 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:14,842 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:14,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 01:09:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:14,945 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:14,946 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:14,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:14,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:14,946 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:14,946 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:14,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:14,946 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-10-01 01:09:14,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:14,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:14,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:14,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:14,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:14,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:15,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:15,008 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:15,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:15,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:15,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:15,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:15,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:15,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:15,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:15,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:15,082 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:15,396 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:09:15,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:15,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:15,396 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:09:15,396 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:09:15,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:09:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 01:09:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:15,499 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:15,499 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:15,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:15,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:15,499 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:15,500 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:15,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-10-01 01:09:15,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:15,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:15,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:15,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:15,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:15,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:15,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:15,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:15,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:15,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:15,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:15,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:15,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:15,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:15,635 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:15,925 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:09:15,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:15,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:15,925 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:09:15,926 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:09:15,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:09:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-01 01:09:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:16,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:16,016 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:16,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:16,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:16,016 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:16,016 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:16,016 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-10-01 01:09:16,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:16,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:16,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:16,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:16,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:16,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:16,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:16,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:16,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:16,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:16,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:16,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:16,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:16,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:16,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:16,241 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:16,559 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:16,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:16,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:16,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:16,560 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:16,560 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:16,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:09:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:16,667 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:16,668 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:16,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:16,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:16,668 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:16,668 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:16,668 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:16,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-10-01 01:09:16,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:16,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:16,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:16,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:16,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:16,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:16,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:16,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:16,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:16,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:16,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:16,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:16,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:16,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:16,912 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:16,912 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:17,222 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:17,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:17,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:17,223 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:17,223 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:17,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 01:09:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:17,329 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:17,329 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:17,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:17,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:17,330 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:17,330 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:17,330 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-10-01 01:09:17,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:17,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:17,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:17,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:17,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:17,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:17,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:17,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:17,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:17,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:17,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:17,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:17,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:17,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:17,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:17,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:17,459 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:17,762 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:09:17,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:17,763 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:17,763 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:09:17,764 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:09:17,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:09:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 01:09:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:17,878 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:17,879 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:17,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:17,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:17,879 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:17,879 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:17,879 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:17,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-10-01 01:09:17,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:17,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:17,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:17,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:17,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:17,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:17,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:17,936 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:17,946 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:17,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:17,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:18,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:18,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:18,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:18,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:18,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:18,010 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:18,295 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:09:18,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:18,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:18,296 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:09:18,296 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:09:18,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:09:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-01 01:09:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:09:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:09:18,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-01 01:09:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:18,377 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:09:18,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:09:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:18,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:18,377 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:18,377 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:18,377 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-10-01 01:09:18,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:18,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:18,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:18,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:18,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:18,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:18,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:18,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:18,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:18,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:18,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:18,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:18,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:18,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:18,527 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-01 01:09:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:18,805 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:09:18,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:18,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:18,806 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:09:18,806 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:09:18,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:09:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-01 01:09:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:18,919 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:18,919 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:18,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:18,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:18,920 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:18,920 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:18,920 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:18,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-10-01 01:09:18,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:18,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:18,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:18,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:18,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:19,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:19,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:19,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:19,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:19,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:19,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:19,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:19,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:19,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:19,087 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:19,366 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:09:19,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:19,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:19,367 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:09:19,367 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:09:19,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:09:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-01 01:09:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:19,465 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:19,465 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:19,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:19,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:19,465 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:19,466 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:19,466 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:19,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-10-01 01:09:19,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:19,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:19,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:19,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:19,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:19,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:19,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:19,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:19,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:19,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:19,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:19,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:19,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:19,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:19,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:19,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:19,613 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:19,907 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:09:19,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:19,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:19,908 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:09:19,908 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:09:19,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:09:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-01 01:09:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:20,027 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:20,027 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:20,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:20,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:20,027 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:20,027 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:20,027 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-10-01 01:09:20,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:20,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:20,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:20,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:20,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:20,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:20,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:20,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:20,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:20,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:20,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:20,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:20,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:20,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:20,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:20,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:20,149 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:20,444 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:09:20,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:20,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:20,444 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:09:20,444 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:09:20,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:09:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-01 01:09:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:20,551 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:20,552 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:20,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:20,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:20,552 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:20,552 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:20,552 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-10-01 01:09:20,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:20,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:20,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:20,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:20,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:20,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:20,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:20,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:20,638 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:20,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:20,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:20,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:20,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:20,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:20,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:20,712 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:20,992 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:09:20,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:20,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:20,993 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:09:20,993 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:09:20,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:09:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-10-01 01:09:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:21,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:21,099 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:21,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:21,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:21,099 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:21,099 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:21,100 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-10-01 01:09:21,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:21,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:21,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:21,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:21,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:21,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:21,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:21,182 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:21,189 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:21,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:21,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:21,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:21,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:21,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:21,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:21,248 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:21,506 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:09:21,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:21,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:21,507 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:09:21,507 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:09:21,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:09:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-01 01:09:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:21,611 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:21,611 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:21,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:21,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:21,612 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:21,612 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:21,612 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:21,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-10-01 01:09:21,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:21,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:21,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:21,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:21,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:21,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:21,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:21,683 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:21,691 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:21,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:21,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:21,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:21,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:21,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:21,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:21,762 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:22,016 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:09:22,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:22,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:22,017 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:09:22,017 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:09:22,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:09:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-01 01:09:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:22,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:22,130 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:22,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:22,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:22,131 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:22,131 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:22,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:22,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-10-01 01:09:22,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:22,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:22,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:22,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:22,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:22,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:22,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:22,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:22,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:22,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:22,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:22,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:22,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:22,271 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:22,271 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:22,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:22,509 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-10-01 01:09:22,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:22,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:22,509 INFO L225 Difference]: With dead ends: 34 [2018-10-01 01:09:22,510 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 01:09:22,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 01:09:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-10-01 01:09:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:09:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:09:22,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-01 01:09:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:22,580 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:09:22,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:09:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:22,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:22,580 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:09:22,580 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:22,580 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-10-01 01:09:22,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:22,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:22,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:22,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:22,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:22,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:22,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:22,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:22,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:22,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:22,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:22,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:22,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:22,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:22,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:22,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:22,744 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-10-01 01:09:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:23,106 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:23,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:23,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:23,106 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:23,107 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:23,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:23,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:23,228 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:23,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:23,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:23,228 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:23,228 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:23,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-10-01 01:09:23,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:23,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:23,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:23,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:23,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:23,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:23,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:23,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:23,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:23,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:23,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:23,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:23,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:23,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:23,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:23,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:23,347 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:23,707 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:23,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:23,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:23,708 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:23,708 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:23,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:09:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:23,836 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:23,836 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:23,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:23,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:23,836 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:23,836 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:23,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:23,836 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-10-01 01:09:23,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:23,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:23,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:23,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:23,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:23,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:23,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:23,903 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:23,909 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:23,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:23,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:23,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:23,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:23,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:23,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:23,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:23,961 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:24,341 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:24,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:24,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:24,342 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:24,342 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:24,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:24,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:24,466 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:24,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:24,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:24,467 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:24,467 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:24,467 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-10-01 01:09:24,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:24,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:24,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:24,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:24,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:24,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:24,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:24,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:24,548 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:24,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:24,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:24,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:24,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:24,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:24,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:24,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:24,610 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:24,984 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:24,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:24,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:24,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:24,985 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:24,985 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:24,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-01 01:09:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:25,119 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:25,120 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:25,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:25,120 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:25,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:25,120 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:25,120 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:25,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:25,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-10-01 01:09:25,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:25,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:25,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:25,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:25,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:25,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:25,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:25,179 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:25,188 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:25,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:25,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:25,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:25,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:25,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:25,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:25,255 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:25,625 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:25,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:25,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:25,626 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:25,626 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:25,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-01 01:09:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:25,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:25,748 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:25,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:25,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:25,748 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:25,748 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:25,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:25,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-10-01 01:09:25,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:25,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:25,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:25,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:25,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:25,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:25,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:25,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:25,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:25,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:25,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:25,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:25,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:25,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:25,882 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:26,236 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:26,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:26,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:26,237 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:26,237 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:26,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-01 01:09:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:26,358 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:26,358 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:26,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:26,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:26,358 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:26,358 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:26,358 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:26,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-10-01 01:09:26,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:26,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:26,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:26,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:26,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:26,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:26,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:26,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:26,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:26,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:26,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:26,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:26,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:26,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:26,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:26,527 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:26,858 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:26,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:26,859 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:26,859 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:26,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:09:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:26,982 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:26,982 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:26,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:26,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:26,983 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:26,983 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:26,983 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-10-01 01:09:26,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:26,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:26,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:26,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:26,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:27,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:27,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:27,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:27,052 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:27,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:27,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:27,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:27,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:27,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:27,117 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:27,117 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:27,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:27,464 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:09:27,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:27,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:27,465 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:09:27,465 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:09:27,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:09:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-01 01:09:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:09:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:09:27,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-01 01:09:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:27,567 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:09:27,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:09:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:27,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:27,567 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:27,568 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:27,568 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-10-01 01:09:27,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:27,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:27,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:27,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:27,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:27,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:27,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:27,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:27,652 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:27,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:27,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:27,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:27,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:27,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:27,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:27,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:27,714 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-01 01:09:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:28,107 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:28,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:28,107 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:28,108 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:28,108 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:28,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:28,229 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:28,229 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:28,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:28,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:28,229 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:28,230 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:28,230 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-10-01 01:09:28,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:28,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:28,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:28,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:28,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:28,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:28,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:28,289 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:28,298 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:28,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:28,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:28,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:28,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:28,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:28,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:28,356 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:28,356 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:28,751 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:28,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:28,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:28,751 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:28,752 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:28,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:09:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:28,876 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:28,876 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:28,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:28,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:28,877 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:28,877 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:28,877 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-10-01 01:09:28,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:28,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:28,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:28,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:28,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:28,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:28,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:28,956 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:28,965 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:28,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:28,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:29,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:29,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:29,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:29,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:29,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:29,033 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:29,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:29,413 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:29,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:29,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:29,414 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:29,414 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:29,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:29,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:29,552 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:29,552 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:29,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:29,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:29,552 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:29,553 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:29,553 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-10-01 01:09:29,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:29,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:29,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:29,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:29,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:29,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:29,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:29,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:29,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:29,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:29,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:29,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:29,697 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:30,072 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:30,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:30,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:30,073 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:30,073 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:30,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-01 01:09:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:30,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:30,193 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:30,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:30,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:30,193 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:30,193 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:30,194 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:30,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-10-01 01:09:30,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:30,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:30,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:30,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:30,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:30,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:30,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:30,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:30,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:30,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:30,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:30,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:30,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:30,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:30,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:30,320 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:30,321 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:30,701 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:30,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:30,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:30,702 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:30,702 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:30,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-01 01:09:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:30,828 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:30,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:30,828 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:30,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:30,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:30,828 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:30,828 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:30,828 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:30,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-10-01 01:09:30,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:30,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:30,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:30,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:30,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:30,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:30,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:30,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:30,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:30,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:30,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:30,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:30,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:30,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:30,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:30,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:30,973 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:31,353 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:31,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:31,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:31,354 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:31,354 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:31,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-01 01:09:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:31,474 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:31,474 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:31,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:31,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:31,475 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:31,475 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:31,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:31,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-10-01 01:09:31,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:31,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:31,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:31,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:31,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:31,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:31,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:31,542 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:31,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:31,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:31,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:31,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:31,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:31,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:31,607 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:31,607 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:31,973 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:31,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:31,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:31,973 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:31,974 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:31,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:09:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:32,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:32,104 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:32,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:32,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:32,104 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:32,104 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:32,104 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-10-01 01:09:32,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:32,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:32,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:32,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:32,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:32,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:32,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:32,190 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:32,218 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:32,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:32,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:32,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:32,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:32,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:32,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:32,278 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:32,279 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:33,119 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:09:33,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:33,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:33,119 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:09:33,120 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:09:33,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:09:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-10-01 01:09:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:09:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:09:33,281 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-01 01:09:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:33,281 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:09:33,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:09:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:33,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:33,282 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:33,282 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:33,282 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-10-01 01:09:33,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:33,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:33,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:33,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:33,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:33,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:33,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:33,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:34,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:34,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:34,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:34,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:34,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:34,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:34,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:34,354 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:34,354 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-01 01:09:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:34,702 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:34,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:34,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:34,703 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:34,703 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:34,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:09:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:34,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:09:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:34,833 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:34,833 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:34,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:34,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:34,833 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:34,834 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:34,834 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:34,834 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-10-01 01:09:34,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:34,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:34,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:34,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:34,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:34,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:34,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:34,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:34,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:35,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:35,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:35,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:35,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:35,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:35,022 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:35,547 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:35,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:35,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:35,548 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:35,548 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:35,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 01:09:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:35,686 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:35,686 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:35,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:35,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:35,686 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:35,686 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:35,686 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:35,687 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-10-01 01:09:35,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:35,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:35,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:35,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:35,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:35,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:35,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:35,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:35,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:35,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:35,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:35,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:35,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:35,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:35,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:35,862 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:36,245 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:09:36,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:36,245 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:36,246 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:09:36,246 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:09:36,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:09:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 01:09:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:36,377 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:36,377 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:36,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:36,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:36,377 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:36,378 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:36,378 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-10-01 01:09:36,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:36,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:36,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:36,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:36,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:36,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:36,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:36,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:36,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:36,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:36,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:36,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:36,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:36,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:36,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:36,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:36,501 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:36,866 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:09:36,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:36,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:36,867 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:09:36,867 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:09:36,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:09:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-01 01:09:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:36,984 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:36,984 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:36,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:36,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:36,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:36,985 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:36,985 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:36,985 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-10-01 01:09:36,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:36,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:36,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:36,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:36,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:37,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:37,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:37,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:37,048 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:37,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:37,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:37,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:37,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:37,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:37,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:37,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:37,122 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:37,487 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:37,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:37,487 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:37,488 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:37,488 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:37,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:09:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:37,621 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:37,621 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:37,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:37,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:37,622 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:37,622 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:37,622 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:37,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-10-01 01:09:37,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:37,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:37,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:37,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:37,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:37,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:37,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:37,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:37,693 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:37,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:37,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:37,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:37,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:37,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:37,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:37,746 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:38,124 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:09:38,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:38,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:38,125 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:09:38,125 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:09:38,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:09:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 01:09:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:38,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:38,266 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:38,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:38,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:38,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:38,266 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:38,267 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:38,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-10-01 01:09:38,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:38,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:38,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:38,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:38,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:38,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:38,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:38,325 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:38,333 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:38,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:38,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:38,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:38,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:38,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:38,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:38,405 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:38,762 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:09:38,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:38,763 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:38,763 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:09:38,763 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:09:38,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:09:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 01:09:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:38,908 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:38,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:38,908 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:38,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:38,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:38,908 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:38,909 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:38,909 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:38,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-10-01 01:09:38,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:38,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:38,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:38,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:38,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:38,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:38,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:38,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:38,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:39,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:39,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:39,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:39,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:39,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:39,024 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:39,360 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:09:39,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:39,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:39,361 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:09:39,361 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:09:39,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:09:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-01 01:09:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:09:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:09:39,466 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-01 01:09:39,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:39,466 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:09:39,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:39,466 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:09:39,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:39,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:39,466 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:39,467 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:39,467 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-10-01 01:09:39,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:39,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:39,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:39,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:39,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:39,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:39,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:39,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:39,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:39,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:39,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:39,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:39,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:39,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:39,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:39,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:39,594 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-01 01:09:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:39,923 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:09:39,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:39,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:39,924 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:09:39,924 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:09:39,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:09:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-01 01:09:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:40,072 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:40,072 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:40,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:40,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:40,072 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:40,072 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:40,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:40,072 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-10-01 01:09:40,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:40,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:40,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:40,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:40,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:40,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:40,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:40,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:40,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:40,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:40,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:40,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:40,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:40,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:40,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:40,281 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:40,603 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:09:40,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:40,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:40,604 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:09:40,604 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:09:40,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:09:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-01 01:09:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:40,748 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:40,749 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:40,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:40,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:40,749 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:40,749 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:40,749 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-10-01 01:09:40,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:40,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:40,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:40,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:40,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:40,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:40,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:40,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:40,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:40,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:40,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:40,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:40,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:40,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:40,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:40,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:40,910 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:41,298 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:09:41,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:41,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:41,298 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:09:41,299 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:09:41,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:09:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-01 01:09:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:41,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:41,446 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:41,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:41,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:41,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:41,447 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:41,447 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:41,447 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-10-01 01:09:41,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:41,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:41,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:41,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:41,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:41,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:41,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:41,502 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:41,512 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:41,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:41,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:41,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:41,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:41,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:41,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:41,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:41,588 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:41,912 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:09:41,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:41,912 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:41,913 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:09:41,913 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:09:41,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:09:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-01 01:09:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:42,044 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:42,044 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:42,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:42,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:42,044 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:42,044 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:42,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-10-01 01:09:42,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:42,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:42,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:42,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:42,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:42,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:42,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:42,105 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:42,127 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:42,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:42,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:42,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:42,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:42,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:42,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:42,191 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:42,191 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:42,525 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:09:42,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:42,525 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:42,526 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:09:42,526 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:09:42,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:09:42,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-10-01 01:09:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:42,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:42,674 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:42,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:42,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:42,675 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:42,675 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:42,675 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-10-01 01:09:42,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:42,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:42,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:42,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:42,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:42,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:42,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:42,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:42,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:42,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:42,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:42,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:42,793 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:42,793 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:43,115 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:09:43,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:43,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:43,116 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:09:43,116 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:09:43,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:09:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-01 01:09:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:43,249 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:43,249 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:43,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:43,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:43,249 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:43,250 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:43,250 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-10-01 01:09:43,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:43,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:43,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:43,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:43,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:43,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:43,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:43,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:43,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:43,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:43,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:43,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:43,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:43,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:43,401 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:43,402 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:43,696 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-01 01:09:43,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:43,697 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:43,697 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:09:43,697 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:09:43,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:09:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-01 01:09:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:43,851 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:43,851 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:43,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:43,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:43,851 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:09:43,852 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:43,852 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-10-01 01:09:43,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:43,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:43,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:43,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:43,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:43,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:43,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:43,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:43,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:43,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:43,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:44,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:44,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:44,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:44,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:44,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:44,038 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:44,313 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-10-01 01:09:44,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:44,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:44,314 INFO L225 Difference]: With dead ends: 34 [2018-10-01 01:09:44,314 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 01:09:44,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 01:09:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-10-01 01:09:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:09:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:09:44,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-01 01:09:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:44,409 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:09:44,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:09:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:44,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:44,409 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:09:44,410 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:44,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-10-01 01:09:44,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:44,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:44,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:44,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:44,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:44,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:44,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:44,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:44,482 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:44,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:44,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:44,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:44,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:44,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:44,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:44,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:44,534 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-10-01 01:09:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:45,000 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:09:45,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:45,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:45,001 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:09:45,001 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:09:45,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:09:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 01:09:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:45,167 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:45,167 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:45,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:45,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:45,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:45,168 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:45,168 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:45,168 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:45,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-10-01 01:09:45,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:45,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:45,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:45,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:45,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:45,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:45,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:45,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:45,250 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:45,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:45,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:45,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:45,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:45,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:45,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:45,302 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:09:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:45,819 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:09:45,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:45,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:45,820 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:09:45,820 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:09:45,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:09:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-01 01:09:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:45,987 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:45,987 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:45,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:45,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:45,987 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:45,987 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:45,987 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-10-01 01:09:45,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:45,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:45,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:45,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:45,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:46,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:46,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:46,065 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:46,079 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:46,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:46,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:46,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:46,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:46,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:46,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:46,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:46,181 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:46,704 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:09:46,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:46,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:46,705 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:09:46,705 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:09:46,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:09:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-01 01:09:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:46,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:46,896 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:46,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:46,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:46,897 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:46,897 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:46,897 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:46,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-10-01 01:09:46,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:46,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:46,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:46,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:46,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:46,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:46,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:46,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:46,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:47,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:47,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:47,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:47,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:47,034 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:09:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:47,515 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:09:47,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:47,517 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:47,518 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:09:47,518 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:09:47,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:09:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-01 01:09:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:47,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:47,664 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:47,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:47,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:47,664 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:47,664 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:47,664 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:47,664 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-10-01 01:09:47,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:47,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:47,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:47,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:47,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:47,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:47,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:47,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:47,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:47,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:47,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:47,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:47,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:47,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:47,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:47,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:47,785 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:48,294 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:09:48,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:48,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:48,295 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:09:48,295 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:09:48,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:09:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 01:09:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:48,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:48,463 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:48,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:48,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:48,463 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:48,463 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:48,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:48,463 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-10-01 01:09:48,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:48,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:48,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:48,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:48,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:48,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:48,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:48,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:48,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:48,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:48,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:48,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:48,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:48,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:48,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:48,585 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:48,585 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:09:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:49,093 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:09:49,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:49,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:49,093 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:09:49,093 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:09:49,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:09:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-01 01:09:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:49,252 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:49,253 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:49,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:49,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:49,253 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:49,253 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:49,253 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-10-01 01:09:49,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:49,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:49,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:49,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:49,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:49,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:49,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:49,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:49,339 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:49,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:49,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:49,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:49,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:49,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:49,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:49,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:49,665 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:50,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:50,153 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:09:50,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:50,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:50,154 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:09:50,154 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:09:50,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:09:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:09:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-01 01:09:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:50,324 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:50,324 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:50,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:50,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:50,325 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:50,325 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:50,325 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-10-01 01:09:50,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:50,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:50,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:50,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:50,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:50,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:50,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:50,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:50,397 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:50,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:50,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:50,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:50,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:50,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:50,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:50,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:50,458 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:09:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:51,088 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:09:51,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:51,088 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:51,089 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:09:51,089 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:09:51,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:09:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-01 01:09:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:09:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:09:51,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:09:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:51,235 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:09:51,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:09:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:51,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:51,236 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:51,236 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:51,236 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:51,236 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-10-01 01:09:51,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:51,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:51,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:51,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:51,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:51,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:51,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:51,301 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:51,311 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:51,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:51,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:51,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:51,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:51,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:51,379 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:51,379 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:09:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:51,888 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:09:51,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:51,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:51,889 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:09:51,889 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:09:51,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:09:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:09:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:52,072 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:52,072 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:52,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:52,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:52,072 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:52,073 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:52,073 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-10-01 01:09:52,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:52,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:52,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:52,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:52,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:52,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:52,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:52,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:52,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:52,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:52,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:52,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:52,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:52,303 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:09:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:52,775 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:09:52,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:52,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:52,776 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:09:52,776 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:09:52,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:09:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:09:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 01:09:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:52,951 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:52,951 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:52,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:52,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:52,952 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:52,952 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:52,952 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:52,952 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-10-01 01:09:52,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:52,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:52,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:52,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:52,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:53,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:53,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:53,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:53,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:53,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:53,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:53,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:53,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:53,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:53,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:53,077 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:53,576 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:09:53,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:53,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:53,577 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:09:53,577 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:09:53,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:09:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:09:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:53,744 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:53,744 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:53,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:53,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:53,745 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:53,745 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:53,745 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:53,745 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-10-01 01:09:53,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:53,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:53,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:53,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:53,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:54,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:54,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:54,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:54,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:54,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:54,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:55,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:55,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:55,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:55,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:55,080 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:55,080 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:09:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:55,572 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:09:55,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:55,572 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:55,572 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:09:55,572 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:09:55,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:09:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:09:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-01 01:09:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:09:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:09:55,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:09:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:55,728 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:09:55,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:09:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:55,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:55,728 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:55,728 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:55,728 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-10-01 01:09:55,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:55,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:55,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:55,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:55,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:55,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:55,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:55,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:55,802 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:55,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:55,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:55,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:55,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:55,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:55,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:55,865 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:55,865 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:09:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:56,319 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:56,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:56,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:56,320 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:56,320 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:56,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 01:09:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:56,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:56,499 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:56,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:56,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:56,500 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:56,500 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:56,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-10-01 01:09:56,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:56,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:56,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:56,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:56,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:56,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:56,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:56,568 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:56,577 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:09:56,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:56,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:56,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:56,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:56,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:56,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:56,626 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:56,626 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:09:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:57,084 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:09:57,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:57,085 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:57,085 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:09:57,085 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:09:57,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:09:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:09:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:09:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:09:57,251 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:09:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:57,252 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:09:57,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:09:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:57,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:57,252 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:57,252 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:57,252 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-10-01 01:09:57,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:57,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:57,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:57,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:57,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:57,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:57,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:57,311 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:09:57,320 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:09:57,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:57,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:57,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:57,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:57,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:57,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:57,377 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:09:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:57,828 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:09:57,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:57,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:57,829 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:09:57,829 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:09:57,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:09:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 01:09:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:58,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:58,033 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:58,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:58,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:58,034 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:58,034 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:58,034 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:58,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-10-01 01:09:58,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:58,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:58,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:58,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:58,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:58,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:58,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:58,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:58,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:58,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:58,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:58,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:58,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:58,159 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:09:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:58,575 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:09:58,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:58,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:58,576 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:09:58,576 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:09:58,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:09:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-01 01:09:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:09:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:09:58,708 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-01 01:09:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:58,708 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:09:58,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:09:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:58,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:58,708 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:09:58,708 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:58,709 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:58,709 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-10-01 01:09:58,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:58,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:58,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:58,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:58,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:58,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:58,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:58,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:58,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:58,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:58,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:58,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:58,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:58,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:58,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:58,830 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:58,830 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-01 01:09:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:59,345 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:09:59,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:09:59,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:09:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:59,345 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:09:59,345 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:09:59,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:09:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:09:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 01:09:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:09:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:09:59,522 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:09:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:59,522 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:09:59,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:09:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:09:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:09:59,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:59,523 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:09:59,523 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:59,523 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-10-01 01:09:59,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:59,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:59,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:59,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:59,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:59,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:59,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:59,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:59,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:09:59,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:59,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:59,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:59,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:09:59,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:09:59,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:09:59,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:59,654 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:00,195 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:10:00,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:00,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:00,195 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:10:00,195 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:10:00,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:10:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-01 01:10:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:00,367 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:00,367 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:00,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:00,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:00,367 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:00,367 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:00,367 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-10-01 01:10:00,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:00,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:00,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:00,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:00,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:00,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:00,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:00,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:00,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:00,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:00,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:00,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:00,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:00,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:00,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:00,487 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:01,023 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:10:01,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:01,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:01,029 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:10:01,029 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:10:01,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:10:01,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-01 01:10:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:01,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:01,215 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:01,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:01,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:01,215 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:01,215 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:01,216 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-10-01 01:10:01,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:01,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:01,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:01,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:01,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:01,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:01,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:01,290 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:01,300 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:10:01,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:01,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:01,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:01,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:01,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:01,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:01,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:01,372 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:01,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:01,910 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:10:01,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:01,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:01,911 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:10:01,911 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:10:01,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:10:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-01 01:10:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:10:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:10:02,086 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:10:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:02,086 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:10:02,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:10:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:02,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:02,087 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:02,087 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:02,087 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:02,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-10-01 01:10:02,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:02,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:02,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:02,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:02,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:02,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:02,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:02,149 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:02,157 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:10:02,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:02,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:02,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:02,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:02,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:02,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:02,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:02,210 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:10:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:02,769 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:10:02,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:02,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:02,770 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:10:02,770 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:10:02,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:10:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 01:10:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:02,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:02,963 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:02,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:02,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:02,964 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:02,964 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:02,964 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-10-01 01:10:02,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:02,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:02,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:02,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:02,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:03,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:03,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:03,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:03,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:03,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:03,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:03,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:03,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:03,104 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:03,667 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:10:03,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:03,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:03,668 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:10:03,668 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:10:03,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:10:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-01 01:10:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:03,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:03,858 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:03,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:03,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:03,858 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:03,858 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:03,858 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:03,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-10-01 01:10:03,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:03,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:03,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:03,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:03,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:03,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:03,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:03,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:03,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:03,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:03,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:03,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:03,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:03,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:03,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:03,987 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:03,987 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:04,526 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:10:04,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:04,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:04,527 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:10:04,527 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:10:04,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:10:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-01 01:10:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:04,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:04,709 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:04,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:04,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:04,710 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:04,710 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:04,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:04,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-10-01 01:10:04,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:04,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:04,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:04,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:04,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:04,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:04,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:04,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:04,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:10:04,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:04,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:04,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:04,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:04,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:04,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:04,883 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:05,394 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:10:05,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:05,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:05,395 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:10:05,395 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:10:05,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:10:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-01 01:10:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:10:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:10:05,562 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:10:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:05,563 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:10:05,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:10:05,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:05,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:05,563 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:05,563 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:05,563 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-10-01 01:10:05,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:05,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:05,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:05,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:05,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:05,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:05,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:05,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:05,626 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:05,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:05,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:05,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:05,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:05,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:05,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:05,693 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:10:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:06,205 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:10:06,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:06,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:06,205 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:10:06,205 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:10:06,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:10:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:10:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:06,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:06,423 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:06,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:06,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:06,423 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:06,423 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:06,424 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:06,424 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-10-01 01:10:06,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:06,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:06,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:06,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:06,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:06,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:06,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:06,501 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:06,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:10:06,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:06,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:06,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:06,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:06,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:06,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:06,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:06,586 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:07,114 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:10:07,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:07,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:07,114 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:10:07,115 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:10:07,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:10:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 01:10:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:07,311 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:07,312 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:07,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:07,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:07,312 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:07,312 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:07,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-10-01 01:10:07,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:07,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:07,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:07,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:07,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:07,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:07,405 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:10:07,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:07,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:07,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:07,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:07,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:07,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:07,472 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:08,005 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:10:08,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:08,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:08,006 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:10:08,006 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:10:08,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:10:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:10:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:08,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:08,197 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:08,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:08,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:08,197 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:08,197 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:08,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-10-01 01:10:08,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:08,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:08,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:08,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:08,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:08,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:08,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:08,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:08,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:08,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:08,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:08,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:08,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:08,330 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:08,834 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:10:08,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:08,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:08,834 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:10:08,835 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:10:08,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:10:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-01 01:10:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:10:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:10:09,008 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:10:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:09,009 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:10:09,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:10:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:09,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:09,009 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:09,009 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:09,009 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:09,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-10-01 01:10:09,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:09,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:09,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:09,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:09,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:09,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:09,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:09,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:09,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:09,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:09,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:09,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:09,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:09,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:09,130 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:09,130 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:10:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:09,607 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:10:09,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:09,607 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:09,608 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:10:09,608 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:10:09,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:10:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 01:10:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:09,805 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:09,805 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:09,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:09,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:09,806 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:09,806 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:09,806 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-10-01 01:10:09,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:09,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:09,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:09,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:10,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:10,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:10,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:10:10,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:10,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:10,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:10,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:10,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:10,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:10,102 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:10,595 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:10:10,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:10,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:10,596 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:10:10,596 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:10:10,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:10:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:10:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:10:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:10,788 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:10,788 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:10,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:10,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:10,788 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:10,788 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:10,789 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-10-01 01:10:10,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:10,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:10,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:10,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:10,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:10,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:10,846 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:10,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:10,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:10,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:10,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:10,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:10,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:10,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:10,944 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:11,409 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:10:11,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:11,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:11,410 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:10:11,410 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:10:11,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:10:11,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 01:10:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:11,608 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:11,608 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:11,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:11,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:11,609 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:10:11,609 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:11,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-10-01 01:10:11,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:11,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:11,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:11,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:11,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:11,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:11,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:11,677 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:11,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:10:11,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:11,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:11,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:11,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:11,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:11,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:11,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:11,762 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:12,222 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:10:12,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:12,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:12,223 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:10:12,223 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:10:12,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:10:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-10-01 01:10:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:10:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:10:12,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-01 01:10:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:12,354 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:10:12,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:10:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:12,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:12,354 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:12,354 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:12,354 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:12,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-10-01 01:10:12,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:12,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:12,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:12,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:12,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:12,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:12,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:12,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:12,422 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:10:12,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:12,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:12,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:12,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:12,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:12,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:12,491 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:12,491 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-01 01:10:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:13,010 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:10:13,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:13,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:13,010 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:10:13,011 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:10:13,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:10:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:10:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:13,220 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:13,220 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:13,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:13,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:13,220 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:13,221 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:13,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-10-01 01:10:13,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:13,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:13,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:13,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:13,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:13,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:13,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:13,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:13,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:13,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:13,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:13,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:13,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:13,340 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:13,340 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:13,857 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:10:13,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:13,857 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:13,858 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:10:13,858 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:10:13,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:10:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:10:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:14,065 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:14,065 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:14,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:14,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:14,066 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:14,066 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:14,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-10-01 01:10:14,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:14,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:14,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:14,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:14,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:14,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:14,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:14,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:14,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:14,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:14,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:14,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:14,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:14,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:14,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:14,198 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:14,739 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:10:14,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:14,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:14,740 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:10:14,740 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:10:14,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:10:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:10:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:14,957 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:14,957 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:14,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:14,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:14,958 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:14,958 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:14,958 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-10-01 01:10:14,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:14,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:14,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:14,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:14,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:15,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:15,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:15,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:15,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:10:15,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:15,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:15,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:15,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:15,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:15,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:15,087 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:15,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:15,613 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:10:15,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:15,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:15,614 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:10:15,614 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:10:15,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:10:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-01 01:10:15,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:10:15,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:10:15,805 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:10:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:15,805 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:10:15,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:10:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:15,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:15,806 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:15,806 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:15,806 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:15,806 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-10-01 01:10:15,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:15,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:15,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:15,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:15,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:15,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:15,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:15,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:15,874 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:15,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:15,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:16,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:16,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:16,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:16,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:16,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:16,026 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:10:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:16,518 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:10:16,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:16,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:16,519 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:10:16,519 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:10:16,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:10:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 01:10:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:16,729 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:16,729 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:16,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:16,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:16,730 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:16,730 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:16,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:16,730 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-10-01 01:10:16,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:16,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:16,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:16,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:16,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:16,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:16,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:16,805 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:16,814 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:10:16,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:16,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:16,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:16,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:16,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:16,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:16,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:16,889 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:17,414 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:10:17,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:17,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:17,415 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:10:17,415 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:10:17,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:10:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-01 01:10:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:17,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:17,615 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:17,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:17,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:17,615 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:17,615 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:17,615 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:17,615 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-10-01 01:10:17,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:17,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:17,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:17,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:17,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:17,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:17,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:17,678 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:17,689 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:10:17,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:17,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:17,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:17,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:17,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:17,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:17,741 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:18,231 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:10:18,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:18,232 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:18,232 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:10:18,232 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:10:18,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:10:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-01 01:10:18,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:18,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:18,439 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:18,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:18,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:18,439 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:18,440 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:18,440 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-10-01 01:10:18,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:18,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:18,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:18,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:18,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:18,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:18,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:18,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:18,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:18,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:18,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:18,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:18,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:18,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:18,557 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:19,011 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:10:19,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:19,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:19,012 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:10:19,012 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:10:19,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:10:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-01 01:10:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:10:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:10:19,185 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:10:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:19,185 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:10:19,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:10:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:19,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:19,185 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:19,186 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:19,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:19,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-10-01 01:10:19,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:19,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:19,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:19,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:19,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:19,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:19,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:19,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:19,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:19,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:19,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:19,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:19,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:19,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:19,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:19,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:19,332 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:10:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:19,918 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:10:19,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:19,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:19,919 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:10:19,919 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:10:19,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:10:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:10:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:20,162 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:20,163 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:20,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:20,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:20,163 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:20,163 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:20,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:20,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-10-01 01:10:20,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:20,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:20,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:20,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:20,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:20,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:20,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:20,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:20,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:10:20,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:20,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:20,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:20,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:20,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:20,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:20,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:20,735 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:22,010 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:10:22,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:22,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:22,010 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:10:22,010 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:10:22,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:10:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:10:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 01:10:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:22,224 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:22,224 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:22,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:22,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:22,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:22,225 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:22,225 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:22,225 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-10-01 01:10:22,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:22,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:22,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:22,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:22,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:22,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:22,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:22,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:22,294 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:22,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:22,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:22,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:22,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:22,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:22,361 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:22,361 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:22,911 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:10:22,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:22,912 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:22,912 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:10:22,912 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:10:22,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:22,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:10:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:10:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:23,130 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:23,130 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:23,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:23,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:23,130 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:23,131 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:23,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-10-01 01:10:23,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:23,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:23,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:23,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:23,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:23,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:23,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:23,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:23,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:10:23,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:23,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:23,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:23,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:23,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:23,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:23,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:23,253 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:23,788 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:10:23,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:23,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:23,789 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:10:23,789 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:10:23,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:10:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-01 01:10:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:10:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:10:23,996 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:10:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:23,997 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:10:23,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:10:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:23,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:23,997 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:23,997 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:23,997 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-10-01 01:10:23,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:23,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:23,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:23,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:23,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:24,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:24,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:24,056 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:24,064 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:10:24,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:24,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:24,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:24,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:24,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:24,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:24,117 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:24,117 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:10:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:24,627 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:10:24,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:24,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:24,627 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:10:24,627 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:10:24,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:10:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 01:10:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:24,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:24,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:24,836 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:24,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:24,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:24,837 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:24,837 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:24,837 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-10-01 01:10:24,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:24,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:24,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:24,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:24,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:24,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:24,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:24,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:24,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:24,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:24,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:24,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:24,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:24,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:24,966 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:25,479 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:10:25,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:25,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:25,480 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:10:25,480 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:10:25,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:10:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-01 01:10:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:25,683 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:25,683 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:25,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:25,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:25,684 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:25,684 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:25,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:25,684 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-10-01 01:10:25,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:25,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:25,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:25,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:25,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:25,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:25,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:25,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:25,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:25,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:25,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:25,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:25,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:25,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:25,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:25,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:25,800 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:26,295 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:10:26,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:26,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:26,296 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:10:26,296 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:10:26,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:10:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-01 01:10:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:26,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:26,509 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:26,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:26,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:26,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:26,509 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:10:26,509 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:26,509 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-10-01 01:10:26,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:26,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:26,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:26,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:26,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:26,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:26,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:26,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:26,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:10:26,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:26,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:26,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:26,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:26,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:26,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:26,645 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:27,092 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:10:27,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:27,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:27,093 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:10:27,093 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:10:27,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:10:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-10-01 01:10:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:10:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:10:27,248 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-01 01:10:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:27,248 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:10:27,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:10:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:27,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:27,249 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:27,249 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:27,249 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-10-01 01:10:27,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:27,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:27,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:27,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:27,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:27,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:27,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:27,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:27,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:27,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:27,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:28,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:28,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:28,500 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:28,500 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-01 01:10:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:28,998 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:10:28,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:28,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:28,999 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:10:28,999 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:10:28,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:10:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:10:29,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-01 01:10:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:29,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:29,240 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:29,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:29,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:29,240 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:29,240 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:29,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-10-01 01:10:29,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:29,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:29,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:29,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:29,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:29,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:29,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:29,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:29,309 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:10:29,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:29,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:29,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:29,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:29,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:29,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:29,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:29,372 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:29,870 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:10:29,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:29,870 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:29,871 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:10:29,871 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:10:29,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:10:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-01 01:10:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:30,087 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:30,088 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:30,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:30,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:30,088 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:30,088 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:30,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:30,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-10-01 01:10:30,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:30,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:30,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:30,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:30,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:30,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:30,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:30,147 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:30,155 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:10:30,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:30,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:30,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:30,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:30,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:30,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:30,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:30,226 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:30,702 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:10:30,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:30,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:30,703 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:10:30,703 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:10:30,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:10:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-01 01:10:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:30,923 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:30,923 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:30,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:30,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:30,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:30,923 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:30,923 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:30,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:30,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-10-01 01:10:30,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:30,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:30,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:30,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:30,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:30,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:30,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:30,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:30,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:31,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:31,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:31,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:31,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:31,040 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:31,040 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:31,524 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:10:31,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:31,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:31,525 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:10:31,525 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:10:31,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:10:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-01 01:10:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:10:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:10:31,733 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:10:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:31,734 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:10:31,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:10:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:31,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:31,734 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:31,734 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:31,734 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-10-01 01:10:31,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:31,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:31,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:31,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:31,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:31,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:31,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:31,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:31,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:31,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:31,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:31,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:31,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:31,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:31,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:31,855 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:10:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:32,327 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:10:32,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:32,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:32,327 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:10:32,327 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:10:32,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:10:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-01 01:10:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:32,552 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:32,552 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:32,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:32,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:32,552 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:32,553 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:32,553 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-10-01 01:10:32,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:32,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:32,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:32,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:32,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:32,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:32,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:32,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:32,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:10:32,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:32,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:32,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:32,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:32,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:32,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:32,807 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:32,808 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:33,309 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:10:33,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:33,310 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:33,310 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:10:33,310 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:10:33,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:10:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:10:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-01 01:10:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:33,532 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:33,532 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:33,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:33,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:33,533 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:33,533 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:33,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-10-01 01:10:33,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:33,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:33,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:33,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:33,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:33,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:33,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:33,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:33,601 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:33,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:33,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:33,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:33,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:33,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:33,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:33,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:33,656 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:34,146 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:10:34,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:34,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:34,147 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:10:34,147 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:10:34,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:10:34,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-01 01:10:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:34,374 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:34,374 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:34,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:34,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:34,374 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:10:34,374 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:34,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:34,375 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-10-01 01:10:34,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:34,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:34,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:34,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:34,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:34,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:34,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:34,434 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:34,443 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:10:34,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:34,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:34,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:34,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:34,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:34,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:34,508 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:34,970 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:10:34,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:34,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:34,971 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:10:34,971 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:10:34,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:10:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-01 01:10:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:10:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:10:35,168 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-01 01:10:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:35,168 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:10:35,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:10:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:35,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:35,168 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-01 01:10:35,168 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:35,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-10-01 01:10:35,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:35,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:35,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:35,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:35,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:35,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:35,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:35,242 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:35,252 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:10:35,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:35,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:35,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:35,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:35,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:35,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:35,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:35,314 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-01 01:10:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:35,759 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:10:35,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:35,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:35,760 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:10:35,760 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:10:35,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:10:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-01 01:10:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:35,989 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:35,989 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:35,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:35,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:35,990 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:35,990 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:35,990 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-10-01 01:10:35,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:35,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:35,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:35,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:35,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:36,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:36,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:36,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:36,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:36,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:36,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:36,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:36,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:36,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:36,111 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:36,557 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:10:36,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:36,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:36,557 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:10:36,558 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:10:36,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:10:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-01 01:10:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:36,782 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:36,782 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:36,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:36,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:36,782 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:36,783 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:36,783 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:36,783 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-10-01 01:10:36,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:36,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:36,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:36,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:36,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:36,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:36,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:36,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:36,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:36,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:36,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:37,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:37,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:37,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:37,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:37,055 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:38,089 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:10:38,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:38,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:38,090 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:10:38,090 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:10:38,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:10:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:10:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-01 01:10:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:38,334 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:38,334 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:38,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:38,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:38,335 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:10:38,335 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:38,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-10-01 01:10:38,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:38,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:38,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:38,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:38,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:38,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:38,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:38,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:38,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:10:38,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:38,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:38,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:38,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:38,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:38,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:38,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:38,469 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:38,904 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:10:38,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:38,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:38,905 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:10:38,905 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:10:38,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:38,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:10:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-01 01:10:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:10:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:10:39,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-01 01:10:39,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:39,110 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:10:39,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:10:39,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:39,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:39,111 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-01 01:10:39,111 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:39,111 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-10-01 01:10:39,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:39,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:39,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:39,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:39,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:39,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:39,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:39,171 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:39,177 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:39,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:39,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:39,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:39,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:39,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:39,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:39,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:39,241 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-01 01:10:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:39,668 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:10:39,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:39,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:39,669 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:10:39,669 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:10:39,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:10:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-10-01 01:10:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:39,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:39,890 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:39,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:39,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:39,890 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:10:39,891 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:39,891 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-10-01 01:10:39,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:39,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:39,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:39,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:39,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:39,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:39,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:39,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:39,960 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:10:39,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:39,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:40,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:40,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:40,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:40,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:40,015 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:40,451 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:10:40,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:40,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:40,451 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:10:40,452 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:10:40,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:10:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-10-01 01:10:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:40,682 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-01 01:10:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:40,682 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:40,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:40,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:40,683 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-01 01:10:40,683 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:40,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:40,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-10-01 01:10:40,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:40,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:40,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:40,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:40,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:40,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:40,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:40,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:40,750 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:10:40,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:40,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:40,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:40,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:40,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:40,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:40,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:40,889 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-01 01:10:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:41,297 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-01 01:10:41,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:41,297 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:41,298 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:10:41,298 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:10:41,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:10:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-10-01 01:10:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:41,531 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-01 01:10:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:41,531 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:41,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:41,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:41,532 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-10-01 01:10:41,532 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:41,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:41,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-10-01 01:10:41,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:41,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:41,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:41,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:41,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:41,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:41,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:41,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:41,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:41,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:41,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:41,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:41,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:41,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:41,651 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-01 01:10:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:42,036 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-10-01 01:10:42,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:42,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-01 01:10:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:42,037 INFO L225 Difference]: With dead ends: 36 [2018-10-01 01:10:42,037 INFO L226 Difference]: Without dead ends: 34 [2018-10-01 01:10:42,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-01 01:10:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-10-01 01:10:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:10:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-01 01:10:42,178 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-01 01:10:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:42,178 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-01 01:10:42,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:42,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-01 01:10:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:42,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:42,179 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-10-01 01:10:42,179 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:42,179 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:42,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-10-01 01:10:42,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:42,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:42,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:42,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:42,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:42,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:42,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:42,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:42,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:42,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:42,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:42,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:42,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:42,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:42,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:42,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:42,360 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-10-01 01:10:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:43,081 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:10:43,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:43,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:43,083 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:10:43,084 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:10:43,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:10:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:10:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:10:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:10:43,364 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:10:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:43,365 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:10:43,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:10:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:43,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:43,365 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:10:43,366 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:43,366 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-10-01 01:10:43,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:43,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:43,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:43,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:43,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:43,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:43,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:43,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:43,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:43,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:43,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:43,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:43,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:43,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:43,513 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:10:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:44,242 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:10:44,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:44,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:44,243 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:10:44,243 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:10:44,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:10:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:10:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:44,520 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:10:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:44,520 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:44,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:44,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:44,520 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:10:44,520 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:44,520 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-10-01 01:10:44,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:44,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:44,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:44,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:44,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:45,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:45,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:45,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:45,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:45,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:45,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:45,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:45,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:45,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:45,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:45,927 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:10:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:46,676 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:10:46,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:46,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:46,677 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:10:46,678 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:10:46,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 01:10:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:10:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:10:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:10:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:10:46,948 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:10:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:46,948 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:10:46,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:10:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:46,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:46,948 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:10:46,949 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:46,949 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-10-01 01:10:46,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:46,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:46,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:46,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:46,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:47,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:47,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:47,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:47,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:10:47,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:47,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:47,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:47,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:47,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:47,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:47,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:47,074 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:10:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:47,744 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:10:47,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:47,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:47,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:47,744 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:10:47,744 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:10:47,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:10:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-01 01:10:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:47,998 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:10:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:47,998 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:47,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:47,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:47,999 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:10:47,999 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:47,999 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-10-01 01:10:47,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:47,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:48,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:48,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:48,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:48,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:48,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:48,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:48,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:48,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:48,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:48,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:48,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:48,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:48,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:48,155 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:48,155 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:10:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:48,879 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:10:48,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:48,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:48,880 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:10:48,880 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:10:48,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:10:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:10:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:10:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:10:49,158 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:10:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:49,158 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:10:49,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:10:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:49,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:49,159 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:10:49,159 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:49,159 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-10-01 01:10:49,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:49,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:49,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:49,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:49,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:49,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:49,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:49,224 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:49,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:10:49,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:49,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:49,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:49,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:49,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:49,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:49,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:49,291 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:10:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:50,025 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:10:50,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:50,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:50,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:50,025 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:10:50,025 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:10:50,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:10:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:10:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:50,302 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:10:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:50,303 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:50,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:50,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:50,303 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:10:50,303 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:50,303 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-10-01 01:10:50,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:50,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:50,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:50,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:50,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:50,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:50,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:50,369 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:50,377 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:10:50,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:50,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:50,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:50,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:50,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:50,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:50,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:50,447 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:10:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:51,157 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:10:51,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:51,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:51,157 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:10:51,158 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:10:51,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:10:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:10:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:10:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:10:51,429 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:10:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:51,430 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:10:51,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:10:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:51,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:51,430 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:10:51,430 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:51,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-10-01 01:10:51,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:51,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:51,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:51,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:51,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:51,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:51,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:51,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:51,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:51,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:51,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:51,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:51,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:51,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:51,578 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:10:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:52,252 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:10:52,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:52,252 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:52,253 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:10:52,253 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:10:52,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:10:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-01 01:10:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:10:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:10:52,494 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:10:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:52,494 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:10:52,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:10:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:52,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:52,494 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:10:52,495 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:52,495 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-10-01 01:10:52,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:52,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:52,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:52,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:52,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:52,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:52,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:52,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:52,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:52,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:52,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:52,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:52,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:52,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:52,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:52,657 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:10:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:53,371 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:10:53,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:53,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:53,372 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:10:53,372 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:10:53,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:10:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:10:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:10:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:10:53,646 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:10:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:53,646 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:10:53,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:10:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:53,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:53,646 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:10:53,646 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:53,646 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-10-01 01:10:53,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:53,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:53,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:53,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:53,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:53,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:53,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:53,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:53,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:10:53,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:53,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:53,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:53,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:53,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:53,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:53,819 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:10:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:54,479 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:10:54,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:54,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:54,479 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:10:54,479 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:10:54,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:10:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:10:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:54,756 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:10:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:54,756 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:54,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:54,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:54,757 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:10:54,757 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:54,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:54,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-10-01 01:10:54,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:54,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:54,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:54,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:54,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:54,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:54,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:54,821 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:54,828 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:54,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:54,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:54,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:54,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:54,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:54,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:54,900 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:10:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:55,600 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:10:55,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:55,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:55,601 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:10:55,601 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:10:55,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:10:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:10:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:10:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:10:55,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:10:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:55,884 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:10:55,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:55,884 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:10:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:55,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:55,884 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:10:55,884 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:55,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-10-01 01:10:55,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:55,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:55,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:55,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:55,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:55,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:55,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:55,982 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:55,991 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:10:55,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:55,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:56,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:56,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:56,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:56,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:56,042 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:10:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:56,706 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:10:56,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:56,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:56,706 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:10:56,707 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:10:56,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:10:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-01 01:10:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:10:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:10:56,967 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:10:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:56,967 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:10:56,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:10:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:56,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:56,968 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:10:56,968 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:56,968 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-10-01 01:10:56,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:56,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:56,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:56,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:56,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:57,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:57,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:57,050 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:57,059 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:10:57,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:57,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:57,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:57,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:57,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:57,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:57,112 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:57,112 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:10:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:57,743 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:10:57,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:57,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:57,743 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:10:57,743 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:10:57,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:10:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 01:10:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:10:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:10:58,020 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:10:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:58,021 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:10:58,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:10:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:58,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:58,021 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:10:58,021 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:58,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-10-01 01:10:58,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:58,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:58,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:58,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:58,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:58,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:58,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:58,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:58,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:58,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:58,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:58,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:58,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:58,159 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:10:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:58,812 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:10:58,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:58,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:58,813 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:10:58,813 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:10:58,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:10:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:10:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:10:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:10:59,087 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:10:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:59,087 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:10:59,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:10:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:59,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:59,088 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:10:59,088 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:59,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-10-01 01:10:59,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:59,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:59,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:59,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:59,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:59,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:59,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:59,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:59,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:59,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:59,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:59,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:59,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:59,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:59,227 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:59,227 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:10:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:59,836 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:10:59,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:59,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:10:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:59,837 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:10:59,837 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:10:59,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:11:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:11:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:00,119 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:00,119 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:00,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:00,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:00,120 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:00,120 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:00,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-10-01 01:11:00,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:00,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:00,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:00,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:00,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:00,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:00,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:00,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:00,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:00,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:00,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:00,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:00,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:00,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:00,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:00,254 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:00,254 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:00,843 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:11:00,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:00,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:00,844 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:11:00,844 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:00,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-01 01:11:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:11:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:11:01,124 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 01:11:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:01,124 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:11:01,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:11:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:01,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:01,125 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:11:01,125 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:01,125 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-10-01 01:11:01,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:01,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:01,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:01,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:01,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:01,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:01,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:01,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:01,193 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:01,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:01,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:01,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:01,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:01,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:01,262 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:01,262 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 01:11:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:02,033 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:11:02,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:02,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:02,034 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:11:02,034 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:11:02,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:02,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:11:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:11:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:02,318 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:02,318 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:02,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:02,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:02,319 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:02,319 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:02,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:02,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-10-01 01:11:02,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:02,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:02,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:02,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:02,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:02,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:02,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:02,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:02,391 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:02,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:02,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:02,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:02,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:02,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:02,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:02,461 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:03,230 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:11:03,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:03,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:03,231 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:11:03,231 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:11:03,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:11:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:11:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:03,536 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:03,536 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:03,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:03,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:03,537 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:03,537 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:03,537 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-10-01 01:11:03,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:03,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:03,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:03,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:03,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:04,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:04,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:04,306 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:04,413 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:04,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:04,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:04,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:04,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:04,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:04,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:04,872 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:05,594 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:11:05,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:05,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:05,595 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:11:05,595 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:11:05,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:11:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:11:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:11:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:05,892 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:05,892 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:05,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:05,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:05,892 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:05,892 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:05,892 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-10-01 01:11:05,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:05,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:05,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:05,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:05,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:05,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:05,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:05,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:05,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:06,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:06,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:06,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:06,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:06,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:06,033 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:06,768 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:11:06,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:06,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:06,769 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:11:06,769 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:11:06,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:11:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-01 01:11:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:11:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:11:07,032 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:11:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:07,032 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:11:07,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:11:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:07,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:07,033 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:07,033 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:07,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:07,033 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-10-01 01:11:07,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:07,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:07,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:07,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:07,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:07,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:07,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:07,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:07,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:07,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:07,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:07,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:07,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:07,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:07,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:07,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:07,160 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:11:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:07,948 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:11:07,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:07,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:07,948 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:11:07,948 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:11:07,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:11:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:11:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:08,232 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:08,233 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:08,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:08,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:08,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:08,233 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:08,233 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:08,233 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-10-01 01:11:08,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:08,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:08,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:08,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:08,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:08,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:08,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:08,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:08,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:08,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:08,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:08,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:08,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:08,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:08,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:08,441 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:09,228 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:11:09,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:09,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:09,229 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:11:09,229 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:11:09,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:11:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:11:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:09,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:09,508 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:09,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:09,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:09,509 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:09,509 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:09,509 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-10-01 01:11:09,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:09,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:09,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:09,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:09,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:09,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:09,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:09,574 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:09,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:09,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:09,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:09,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:09,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:09,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:09,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:09,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:09,634 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:10,396 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:11:10,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:10,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:10,396 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:11:10,396 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:11:10,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:11:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:11:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:10,697 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:10,697 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:10,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:10,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:10,698 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:10,698 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:10,698 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:10,698 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-10-01 01:11:10,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:10,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:10,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:10,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:10,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:10,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:10,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:10,763 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:10,772 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:10,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:10,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:10,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:10,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:10,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:10,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:10,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:10,842 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:11,548 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:11:11,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:11,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:11,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:11,549 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:11:11,549 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:11:11,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:11:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-01 01:11:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:11:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:11:11,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:11:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:11,810 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:11:11,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:11:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:11,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:11,810 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:11,810 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:11,811 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:11,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-10-01 01:11:11,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:11,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:11,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:11,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:11,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:11,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:11,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:11,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:11,883 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:11,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:11,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:11,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:11,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:11,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:11,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:11,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:11,953 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:11:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:12,669 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:11:12,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:12,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:12,670 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:11:12,670 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:11:12,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:11:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:11:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:12,973 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:12,973 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:12,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:12,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:12,974 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:12,974 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:12,974 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:12,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-10-01 01:11:12,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:12,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:12,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:12,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:12,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:13,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:13,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:13,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:13,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:13,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:13,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:13,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:13,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:13,116 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:13,848 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:11:13,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:13,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:13,849 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:11:13,849 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:11:13,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:11:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:11:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:14,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:14,143 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:14,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:14,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:14,144 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:14,144 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:14,144 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:14,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-10-01 01:11:14,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:14,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:14,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:14,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:14,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:14,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:14,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:14,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:14,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:14,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:14,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:14,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:14,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:14,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:14,278 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:14,278 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:15,011 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:11:15,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:15,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:15,012 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:11:15,012 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:11:15,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:11:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:11:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:15,310 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:15,310 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:15,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:15,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:15,310 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:15,310 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:15,310 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:15,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-10-01 01:11:15,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:15,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:15,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:15,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:15,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:15,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:15,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:15,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:15,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:15,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:15,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:15,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:15,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:15,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:15,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:15,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:15,476 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:16,173 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:11:16,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:16,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:16,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:16,174 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:11:16,174 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:11:16,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:11:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-01 01:11:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:11:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:11:16,474 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:11:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:16,474 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:11:16,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:11:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:16,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:16,475 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:16,475 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:16,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:16,475 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-10-01 01:11:16,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:16,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:16,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:16,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:16,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:16,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:16,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:16,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:16,546 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:16,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:16,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:16,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:16,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:16,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:16,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:16,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:16,615 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:11:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:17,303 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:11:17,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:17,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:17,303 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:11:17,303 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:11:17,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:11:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 01:11:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:17,627 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:17,627 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:17,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:17,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:17,628 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:17,628 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:17,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-10-01 01:11:17,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:17,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:17,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:17,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:17,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:17,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:17,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:17,694 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:17,706 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:17,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:17,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:17,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:17,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:17,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:17,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:17,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:17,762 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:18,437 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:11:18,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:18,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:18,437 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:11:18,437 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:11:18,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:11:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:11:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:18,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:18,749 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:18,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:18,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:18,750 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:18,750 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:18,750 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:18,750 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-10-01 01:11:18,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:18,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:18,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:18,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:18,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:18,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:18,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:18,815 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:18,824 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:18,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:18,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:18,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:18,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:18,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:18,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:18,882 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:19,569 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:11:19,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:19,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:19,569 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:11:19,569 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:11:19,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:11:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:11:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:19,865 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:19,865 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:19,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:19,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:19,866 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:19,866 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:19,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-10-01 01:11:19,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:19,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:19,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:19,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:19,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:19,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:19,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:19,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:19,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:19,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:19,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:19,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:19,990 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:19,990 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:20,626 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:11:20,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:20,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:20,627 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:11:20,627 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:20,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-01 01:11:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:11:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:11:20,839 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-01 01:11:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:20,839 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:11:20,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:11:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:20,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:20,839 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:11:20,839 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:20,839 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:20,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-10-01 01:11:20,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:20,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:20,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:20,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:20,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:20,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:20,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:20,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:20,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:20,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:20,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:20,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:20,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:20,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:20,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:20,975 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:20,975 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-01 01:11:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:21,678 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:11:21,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:21,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:21,679 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:11:21,679 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:11:21,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:11:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:11:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:22,016 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:22,016 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:22,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:22,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:22,017 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:22,017 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:22,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:22,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-10-01 01:11:22,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:22,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:22,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:22,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:22,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:22,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:22,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:22,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:22,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:22,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:22,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:22,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:22,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:22,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:22,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:22,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:22,163 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:22,869 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:11:22,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:22,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:22,869 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:11:22,870 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:11:22,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:11:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:11:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:23,191 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:23,191 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:23,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:23,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:23,191 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:23,192 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:23,192 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-10-01 01:11:23,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:23,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:23,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:23,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:23,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:23,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:23,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:23,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:24,015 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:24,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:24,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:24,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:24,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:24,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:24,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:24,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:24,150 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:24,889 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:11:24,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:24,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:24,889 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:11:24,890 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:11:24,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 01:11:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:11:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:11:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:25,201 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:25,201 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:25,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:25,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:25,202 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:25,202 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:25,202 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-10-01 01:11:25,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:25,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:25,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:25,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:25,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:25,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:25,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:25,267 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:25,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:25,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:25,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:25,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:25,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:25,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:25,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:25,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:25,333 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:26,044 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:11:26,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:26,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:26,044 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:11:26,045 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:11:26,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:11:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 01:11:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:11:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:11:26,363 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:11:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:26,364 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:11:26,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:11:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:26,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:26,364 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:26,364 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:26,364 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-10-01 01:11:26,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:26,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:26,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:26,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:26,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:26,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:26,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:26,427 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:26,438 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:26,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:26,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:26,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:26,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:26,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:26,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:26,507 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:11:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:27,198 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:11:27,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:27,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:27,198 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:11:27,198 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:11:27,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:11:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:11:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:27,514 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:27,514 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:27,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:27,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:27,514 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:27,514 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:27,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:27,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-10-01 01:11:27,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:27,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:27,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:27,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:27,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:27,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:27,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:27,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:27,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:27,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:27,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:27,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:27,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:27,642 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:28,338 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:11:28,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:28,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:28,338 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:11:28,338 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:11:28,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:11:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 01:11:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:28,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:28,709 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:28,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:28,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:28,710 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:28,710 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:28,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:28,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-10-01 01:11:28,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:28,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:28,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:28,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:28,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:28,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:28,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:28,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:28,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:28,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:28,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:28,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:28,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:28,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:28,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:28,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:28,851 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:29,511 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:11:29,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:29,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:29,512 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:11:29,512 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:29,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:11:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:29,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:29,834 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:29,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:29,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:29,834 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:29,834 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:29,834 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-10-01 01:11:29,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:29,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:29,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:29,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:29,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:29,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:29,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:29,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:29,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:29,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:29,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:29,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:29,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:29,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:29,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:29,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:29,966 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:30,608 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:11:30,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:30,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:30,609 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:11:30,609 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:11:30,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:11:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-01 01:11:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:11:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:11:30,897 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:11:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:30,897 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:11:30,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:11:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:30,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:30,898 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:30,898 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:30,898 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-10-01 01:11:30,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:30,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:30,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:30,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:30,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:30,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:30,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:30,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:30,968 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:30,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:30,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:31,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:31,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:31,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:31,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:31,097 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:11:31,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:31,847 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:11:31,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:31,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:31,848 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:11:31,848 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:11:31,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:11:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:11:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:32,173 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:32,174 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:32,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:32,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:32,174 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:32,174 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:32,174 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-10-01 01:11:32,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:32,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:32,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:32,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:32,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:32,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:32,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:32,236 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:32,245 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:32,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:32,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:32,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:32,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:32,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:32,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:32,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:32,301 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:33,026 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:11:33,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:33,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:33,027 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:11:33,027 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:11:33,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:11:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:11:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:33,350 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:33,350 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:33,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:33,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:33,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:33,350 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:33,350 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:33,351 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:33,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-10-01 01:11:33,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:33,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:33,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:33,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:33,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:33,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:33,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:33,448 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:33,460 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:33,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:33,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:33,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:33,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:33,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:33,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:33,744 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:35,034 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:11:35,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:35,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:35,035 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:11:35,035 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:11:35,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:11:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:11:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:11:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:35,371 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:35,371 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:35,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:35,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:35,372 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:35,372 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:35,372 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-10-01 01:11:35,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:35,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:35,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:35,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:35,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:35,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:35,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:35,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:35,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:35,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:35,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:35,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:35,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:35,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:35,498 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:36,217 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:11:36,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:36,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:36,218 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:11:36,218 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:11:36,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:11:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 01:11:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:11:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:11:36,587 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:11:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:36,587 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:11:36,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:11:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:36,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:36,588 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:36,588 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:36,588 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:36,588 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-10-01 01:11:36,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:36,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:36,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:36,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:36,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:36,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:36,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:36,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:36,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:36,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:36,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:36,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:36,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:36,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:36,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:36,715 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:11:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:37,413 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:11:37,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:37,413 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:37,413 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:11:37,413 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:11:37,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:11:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:11:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:37,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:37,773 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:37,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:37,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:37,773 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:37,774 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:37,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-10-01 01:11:37,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:37,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:37,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:37,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:37,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:37,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:37,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:37,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:37,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:37,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:37,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:37,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:37,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:37,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:37,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:37,915 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:38,626 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:11:38,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:38,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:38,626 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:11:38,626 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:11:38,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:11:38,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 01:11:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:38,936 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:38,936 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:38,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:38,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:38,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:38,936 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:38,936 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:38,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-10-01 01:11:38,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:38,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:38,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:38,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:38,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:38,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:38,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:39,005 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:39,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:39,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:39,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:39,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:39,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:39,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:39,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:39,078 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:39,766 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:11:39,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:39,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:39,766 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:11:39,767 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:39,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:11:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:40,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:40,106 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:40,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:40,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:40,106 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:40,106 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:40,106 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:40,107 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-10-01 01:11:40,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:40,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:40,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:40,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:40,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:40,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:40,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:40,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:40,179 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:40,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:40,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:40,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:40,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:40,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:40,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:40,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:40,234 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:40,891 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:11:40,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:40,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:40,892 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:11:40,892 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:11:40,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:11:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-01 01:11:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:11:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:11:41,148 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 01:11:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:41,148 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:11:41,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:11:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:41,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:41,148 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:41,148 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:41,149 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-10-01 01:11:41,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:41,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:41,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:41,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:41,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:41,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:41,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:41,216 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:41,225 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:41,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:41,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:41,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:41,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:41,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:41,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:41,293 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 01:11:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:41,950 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:11:41,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:41,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:41,950 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:11:41,951 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:41,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:11:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:42,291 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:42,291 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:42,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:42,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:42,291 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:42,291 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:42,291 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:42,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-10-01 01:11:42,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:42,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:42,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:42,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:42,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:42,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:42,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:42,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:42,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:42,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:42,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:42,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:42,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:42,432 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:43,106 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:11:43,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:43,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:43,107 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:11:43,107 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:43,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 01:11:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:43,442 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:43,442 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:43,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:43,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:43,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:43,442 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:43,442 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:43,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:43,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-10-01 01:11:43,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:43,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:43,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:43,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:43,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:43,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:43,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:43,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:43,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:43,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:43,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:43,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:43,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:43,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:43,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:43,568 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:43,568 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:44,180 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:11:44,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:44,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:44,181 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:11:44,181 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:11:44,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:11:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-01 01:11:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:44,519 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:44,519 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:44,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:44,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:44,519 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:44,519 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:44,520 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-10-01 01:11:44,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:44,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:44,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:44,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:44,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:44,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:44,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:44,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:44,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:44,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:44,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:44,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:44,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:44,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:44,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:44,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:44,661 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:45,299 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:11:45,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:45,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:45,300 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:11:45,300 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:11:45,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:11:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:11:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:11:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:11:45,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:11:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:45,606 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:11:45,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:11:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:45,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:45,606 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:45,607 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:45,607 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-10-01 01:11:45,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:45,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:45,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:45,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:45,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:45,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:45,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:45,683 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:45,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:45,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:45,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:45,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:45,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:45,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:45,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:45,758 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:11:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:46,429 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:11:46,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:46,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:46,430 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:11:46,430 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:46,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:11:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:46,761 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:46,761 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:46,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:46,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:46,761 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:46,761 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:46,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-10-01 01:11:46,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:46,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:46,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:46,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:46,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:46,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:46,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:46,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:46,833 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:46,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:46,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:46,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:46,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:46,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:46,946 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:46,946 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:47,627 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:11:47,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:47,627 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:47,627 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:11:47,627 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:47,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 01:11:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:47,954 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:47,954 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:47,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:47,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:47,955 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:47,955 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:47,955 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-10-01 01:11:47,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:47,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:47,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:47,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:47,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:48,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:48,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:48,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:48,034 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:48,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:48,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:48,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:48,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:48,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:48,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:48,105 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:48,105 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:48,763 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:11:48,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:48,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:48,763 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:11:48,763 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:11:48,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:11:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-01 01:11:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:49,115 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:49,115 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:49,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:49,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:49,115 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:49,115 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:49,115 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-10-01 01:11:49,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:49,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:49,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:49,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:49,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:49,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:49,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:49,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:49,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:49,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:49,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:49,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:49,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:49,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:49,249 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:49,869 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:11:49,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:49,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:49,870 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:11:49,870 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:11:49,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:11:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 01:11:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:11:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:11:50,162 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:11:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:50,162 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:11:50,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:11:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:50,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:50,162 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:50,163 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:50,163 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-10-01 01:11:50,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:50,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:50,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:50,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:50,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:50,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:50,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:50,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:50,345 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:50,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:50,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:50,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:50,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:50,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:50,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:50,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:50,394 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:11:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:51,003 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:11:51,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:51,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:51,004 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:11:51,004 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:11:51,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:11:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-01 01:11:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:51,342 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:51,342 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:51,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:51,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:51,342 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:51,342 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:51,343 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:51,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-10-01 01:11:51,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:51,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:51,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:51,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:51,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:51,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:51,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:51,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:51,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:51,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:51,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:51,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:51,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:51,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:51,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:51,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:51,475 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:52,084 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:11:52,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:52,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:52,085 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:11:52,085 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:11:52,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:11:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-01 01:11:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:52,410 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:52,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:52,411 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:52,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:52,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:52,411 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:52,411 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:52,411 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:52,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-10-01 01:11:52,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:52,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:52,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:52,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:52,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:52,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:52,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:52,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:52,487 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:52,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:52,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:52,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:52,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:52,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:52,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:52,566 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:53,287 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:11:53,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:53,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:53,287 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:11:53,288 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:11:53,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:11:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-01 01:11:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:53,621 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:53,621 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:53,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:53,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:53,621 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:53,621 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:53,621 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-10-01 01:11:53,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:53,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:53,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:53,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:53,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:53,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:53,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:53,683 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:53,692 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:53,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:53,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:53,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:53,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:53,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:53,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:53,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:53,760 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:54,356 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:11:54,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:54,356 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:54,357 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:11:54,357 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:11:54,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:11:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 01:11:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:11:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:11:54,678 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:11:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:54,678 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:11:54,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:11:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:54,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:54,678 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:11:54,679 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:54,679 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:54,679 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-10-01 01:11:54,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:54,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:54,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:54,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:54,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:54,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:54,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:54,743 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:54,754 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:54,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:54,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:54,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:54,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:54,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:54,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:54,820 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:11:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:55,369 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:11:55,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:55,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:55,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:55,370 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:11:55,370 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:11:55,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:11:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-10-01 01:11:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:55,718 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:55,718 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:55,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:55,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:55,718 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:55,719 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:55,719 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:55,719 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-10-01 01:11:55,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:55,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:55,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:55,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:55,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:55,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:55,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:55,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:55,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:55,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:55,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:55,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:55,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:55,842 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:56,438 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:11:56,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:56,439 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:56,439 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:11:56,439 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:11:56,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:11:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-01 01:11:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:11:56,765 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:11:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:56,765 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:11:56,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:11:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:56,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:56,765 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:11:56,765 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:56,766 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-10-01 01:11:56,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:56,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:56,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:56,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:56,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:56,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:56,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:56,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:56,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:56,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:56,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:56,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:56,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:56,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:56,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:56,902 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:56,903 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:11:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:57,469 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:11:57,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:57,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:57,470 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:11:57,470 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:11:57,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:11:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-10-01 01:11:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:11:57,807 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:11:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:57,807 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:11:57,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:11:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:57,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:57,808 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:11:57,808 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:57,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:57,808 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-10-01 01:11:57,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:57,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:57,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:57,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:57,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:57,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:57,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:57,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:58,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:11:58,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:58,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:58,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:58,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:58,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:58,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:58,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:58,061 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:11:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:58,565 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-10-01 01:11:58,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:58,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:58,566 INFO L225 Difference]: With dead ends: 38 [2018-10-01 01:11:58,566 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 01:11:58,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:58,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 01:11:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-10-01 01:11:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:11:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:11:58,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-01 01:11:58,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:58,779 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:11:58,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:11:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:58,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:58,780 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:11:58,780 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:58,780 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:58,780 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-10-01 01:11:58,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:58,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:58,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:58,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:58,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:58,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:58,879 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:58,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:58,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:59,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:59,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:59,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:59,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:59,041 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-10-01 01:11:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:59,957 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:11:59,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:59,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:11:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:59,958 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:11:59,958 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:11:59,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:12:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:00,337 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:00,337 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:00,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:00,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:00,337 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:12:00,338 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:00,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-10-01 01:12:00,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:00,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:00,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:00,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:00,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:00,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:00,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:00,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:00,419 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:12:00,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:00,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:00,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:00,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:00,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:00,477 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:00,477 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:01,408 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:12:01,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:01,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:01,409 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:12:01,409 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:12:01,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:12:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:01,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:01,774 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:01,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:01,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:01,774 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:12:01,774 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:01,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:01,775 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-10-01 01:12:01,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:01,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:01,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:01,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:01,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:01,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:01,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:01,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:01,854 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:12:01,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:01,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:01,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:01,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:01,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:01,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:01,920 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:02,837 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:12:02,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:02,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:02,838 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:12:02,838 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:12:02,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:12:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:12:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:03,215 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:03,215 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:03,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:03,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:03,215 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:03,216 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:03,216 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-10-01 01:12:03,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:03,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:03,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:03,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:03,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:03,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:03,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:03,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:03,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:03,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:03,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:03,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:03,355 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:03,355 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:04,223 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:12:04,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:04,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:04,223 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:04,223 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:04,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-01 01:12:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:12:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:12:04,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:12:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:04,606 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:12:04,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:12:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:04,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:04,606 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:12:04,606 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:04,606 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:04,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-10-01 01:12:04,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:04,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:04,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:04,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:04,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:04,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:04,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:04,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:04,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:04,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:04,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:04,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:04,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:04,730 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:12:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:05,655 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:12:05,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:05,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:05,656 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:12:05,656 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:12:05,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:12:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:06,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:06,120 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:06,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:06,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:06,121 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:06,121 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:06,121 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-10-01 01:12:06,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:06,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:06,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:06,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:06,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:06,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:06,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:06,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:06,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:12:06,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:06,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:06,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:06,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:06,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:06,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:06,262 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:06,262 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:07,202 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:12:07,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:07,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:07,203 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:12:07,203 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:12:07,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:12:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:07,586 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:07,587 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:07,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:07,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:07,587 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:07,587 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:07,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:07,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-10-01 01:12:07,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:07,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:07,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:07,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:07,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:07,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:07,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:07,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:07,657 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:07,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:07,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:07,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:07,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:07,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:07,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:07,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:07,724 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:08,636 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:12:08,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:08,637 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:08,637 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:12:08,637 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:12:08,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:12:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:12:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:09,030 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:09,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:09,030 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:09,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:09,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:09,030 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:09,030 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:09,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:09,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-10-01 01:12:09,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:09,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:09,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:09,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:09,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:09,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:09,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:09,162 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:09,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:12:09,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:09,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:09,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:09,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:09,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:09,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:09,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:09,475 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:10,363 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:12:10,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:10,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:10,363 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:10,363 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:10,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:12:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-01 01:12:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:12:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:12:10,695 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:12:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:10,695 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:12:10,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:12:10,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:10,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:10,696 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:12:10,696 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:10,696 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:10,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-10-01 01:12:10,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:10,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:10,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:10,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:10,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:10,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:10,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:10,757 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:10,765 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:12:10,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:10,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:10,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:10,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:10,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:10,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:10,831 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:10,831 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:12:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:11,698 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:12:11,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:11,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:11,699 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:11,699 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:11,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:12:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:12,079 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:12,079 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:12,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:12,080 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:12,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:12,080 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:12,080 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:12,080 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:12,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-10-01 01:12:12,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:12,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:12,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:12,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:12,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:12,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:12,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:12,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:12,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:12,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:12,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:12,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:12,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:12,268 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:13,116 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:12:13,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:13,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:13,117 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:13,117 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:13,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:12:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:13,487 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:13,487 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:13,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:13,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:13,488 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:13,488 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:13,488 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:13,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-10-01 01:12:13,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:13,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:13,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:13,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:13,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:13,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:13,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:13,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:13,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:13,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:13,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:13,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:13,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:13,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:13,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:13,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:13,622 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:14,495 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:12:14,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:14,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:14,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:14,496 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:14,496 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:14,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:12:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:14,875 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:14,875 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:14,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:14,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:14,875 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:14,875 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:14,875 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:14,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-10-01 01:12:14,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:14,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:14,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:14,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:14,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:14,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:14,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:14,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:14,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:12:14,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:14,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:15,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:15,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:15,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:15,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:15,004 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:15,004 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:15,821 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:12:15,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:15,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:15,822 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:15,822 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:15,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-01 01:12:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:12:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:12:16,170 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:12:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:16,171 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:12:16,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:12:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:16,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:16,171 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:16,171 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:16,171 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-10-01 01:12:16,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:16,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:16,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:16,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:16,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:16,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:16,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:16,251 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:16,259 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:16,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:16,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:16,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:16,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:16,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:16,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:16,323 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:12:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:17,114 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:12:17,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:17,115 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:17,115 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:12:17,115 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:12:17,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:12:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 01:12:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:17,503 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:17,503 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:17,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:17,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:17,504 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:17,504 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:17,504 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:17,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-10-01 01:12:17,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:17,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:17,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:17,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:17,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:17,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:17,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:17,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:17,576 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:12:17,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:17,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:17,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:17,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:17,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:17,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:17,648 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:18,465 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:12:18,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:18,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:18,466 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:12:18,466 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:12:18,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:12:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:12:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:18,837 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:18,837 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:18,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:18,838 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:18,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:18,838 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:18,838 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:18,838 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-10-01 01:12:18,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:18,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:18,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:18,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:18,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:18,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:18,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:18,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:18,910 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:12:18,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:18,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:18,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:18,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:18,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:18,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:18,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:18,977 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:19,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:19,738 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:12:19,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:19,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:19,739 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:12:19,739 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:12:19,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:12:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:12:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:20,125 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:20,125 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:20,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:20,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:20,126 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:20,126 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:20,126 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:20,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-10-01 01:12:20,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:20,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:20,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:20,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:20,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:20,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:20,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:20,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:20,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:20,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:20,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:20,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:20,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:20,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:20,247 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:20,986 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:12:20,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:20,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:20,987 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:12:20,987 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:12:20,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:12:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-01 01:12:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:12:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:12:21,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 01:12:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:21,277 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:12:21,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:12:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:21,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:21,277 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:12:21,277 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:21,277 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:21,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-10-01 01:12:21,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:21,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:21,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:21,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:21,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:21,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:21,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:21,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:21,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:21,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:21,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:21,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:21,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:21,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:21,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:21,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:21,432 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 01:12:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:22,362 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:12:22,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:22,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:22,363 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:12:22,363 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:12:22,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:12:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:22,760 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:22,760 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:22,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:22,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:22,761 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:22,761 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:22,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:22,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-10-01 01:12:22,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:22,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:22,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:22,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:22,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:22,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:22,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:22,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:22,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:12:22,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:22,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:22,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:22,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:22,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:22,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:22,908 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:23,858 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:12:23,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:23,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:23,858 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:12:23,859 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:12:23,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:12:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:24,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:24,241 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:24,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:24,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:24,241 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:24,241 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:24,241 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-10-01 01:12:24,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:24,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:24,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:24,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:24,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:24,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:24,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:24,308 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:24,317 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:24,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:24,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:24,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:24,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:24,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:24,386 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:24,386 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:25,288 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:12:25,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:25,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:25,291 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:12:25,292 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:12:25,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:12:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:12:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:25,687 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:25,688 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:25,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:25,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:25,688 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:25,688 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:25,688 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:25,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-10-01 01:12:25,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:25,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:25,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:25,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:25,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:25,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:25,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:25,749 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:25,760 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:12:25,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:25,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:25,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:25,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:25,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:25,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:25,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:25,820 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:26,697 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:12:26,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:26,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:26,698 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:26,698 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:26,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-01 01:12:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:12:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:12:27,075 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:12:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:27,076 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:12:27,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:12:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:27,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:27,076 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:27,076 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:27,076 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-10-01 01:12:27,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:27,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:27,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:27,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:27,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:27,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:27,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:27,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:27,144 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:12:27,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:27,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:27,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:27,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:27,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:27,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:27,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:27,214 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:12:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:28,192 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:12:28,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:28,192 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:28,193 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:12:28,193 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:12:28,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:28,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:12:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:28,586 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:28,587 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:28,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:28,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:28,587 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:28,587 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:28,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-10-01 01:12:28,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:28,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:28,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:28,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:28,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:28,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:28,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:28,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:28,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:28,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:28,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:28,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:28,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:28,720 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:29,704 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:12:29,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:29,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:29,704 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:12:29,704 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:12:29,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:12:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:30,087 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:30,087 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:30,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:30,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:30,088 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:30,088 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:30,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:30,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-10-01 01:12:30,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:30,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:30,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:30,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:30,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:30,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:30,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:30,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:30,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:30,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:30,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:30,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:30,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:30,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:30,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:30,221 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:31,152 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:12:31,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:31,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:31,153 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:12:31,153 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:12:31,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:12:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:12:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:31,547 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:31,548 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:31,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:31,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:31,548 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:31,548 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:31,548 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-10-01 01:12:31,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:31,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:31,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:31,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:31,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:31,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:31,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:31,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:31,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:12:31,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:31,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:31,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:31,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:31,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:31,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:31,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:31,680 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:32,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:32,558 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:12:32,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:32,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:32,559 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:32,559 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:32,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-01 01:12:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:12:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:12:32,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:12:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:32,896 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:12:32,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:12:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:32,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:32,896 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:32,896 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:32,897 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-10-01 01:12:32,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:32,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:32,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:32,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:32,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:32,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:32,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:32,958 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:32,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:32,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:32,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:33,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:33,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:33,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:33,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:33,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:33,019 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:12:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:33,903 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:12:33,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:33,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:33,904 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:33,904 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:33,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:12:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:34,301 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:34,301 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:34,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:34,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:34,301 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:34,301 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:34,302 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:34,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-10-01 01:12:34,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:34,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:34,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:34,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:34,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:34,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:34,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:34,365 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:34,373 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:12:34,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:34,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:34,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:34,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:34,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:34,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:34,441 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:35,319 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:12:35,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:35,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:35,320 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:35,320 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:35,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:12:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:35,703 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:35,703 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:35,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:35,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:35,703 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:35,703 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:35,703 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:35,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-10-01 01:12:35,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:35,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:35,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:35,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:35,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:35,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:35,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:35,810 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:35,819 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:12:35,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:35,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:35,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:35,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:35,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:35,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:35,870 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:36,763 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:12:36,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:36,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:36,763 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:36,764 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:36,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:12:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:37,155 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:37,156 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:37,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:37,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:37,156 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:37,156 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:37,156 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-10-01 01:12:37,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:37,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:37,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:37,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:37,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:37,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:37,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:37,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:37,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:37,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:37,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:37,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:37,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:37,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:37,283 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:38,150 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:12:38,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:38,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:38,150 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:38,150 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:38,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-01 01:12:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:12:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:12:38,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:12:38,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:38,515 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:12:38,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:38,515 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:12:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:38,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:38,515 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:38,516 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:38,516 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:38,516 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-10-01 01:12:38,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:38,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:38,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:38,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:38,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:38,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:38,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:38,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:38,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:38,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:38,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:38,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:38,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:38,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:38,655 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:38,655 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:12:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:39,477 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:12:39,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:39,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:39,478 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:12:39,478 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:12:39,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:12:39,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 01:12:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:39,876 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:39,876 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:39,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:39,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:39,876 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:39,876 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:39,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-10-01 01:12:39,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:39,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:39,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:39,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:39,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:39,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:39,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:39,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:39,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:12:39,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:39,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:40,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:40,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:40,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:40,052 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:40,052 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:40,914 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:12:40,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:40,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:40,915 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:12:40,915 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:12:40,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:12:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:12:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:41,305 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:41,306 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:41,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:41,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:41,306 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:41,306 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:41,306 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-10-01 01:12:41,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:41,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:41,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:41,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:41,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:41,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:41,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:41,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:41,376 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:41,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:41,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:41,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:41,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:41,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:41,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:41,444 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:42,227 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:12:42,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:42,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:42,227 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:12:42,227 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:12:42,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:12:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:12:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:42,643 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:42,643 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:42,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:42,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:42,643 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:12:42,643 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:42,643 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-10-01 01:12:42,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:42,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:42,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:42,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:42,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:42,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:42,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:42,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:42,714 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:12:42,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:42,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:42,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:42,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:42,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:42,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:42,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:42,782 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:43,551 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:12:43,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:43,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:43,551 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:12:43,552 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:12:43,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:12:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-01 01:12:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:12:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:12:43,839 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-01 01:12:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:43,840 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:12:43,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:12:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:43,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:43,840 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:12:43,840 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:43,840 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-10-01 01:12:43,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:43,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:43,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:43,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:43,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:43,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:43,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:43,903 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:43,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:12:43,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:43,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:43,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:43,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:43,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:43,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:43,981 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:43,981 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-01 01:12:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:44,827 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:12:44,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:44,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:44,827 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:44,828 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:44,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:12:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:45,287 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:45,287 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:45,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:45,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:45,288 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:45,288 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:45,288 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-10-01 01:12:45,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:45,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:45,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:45,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:45,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:45,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:45,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:45,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:45,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:45,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:45,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:45,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:45,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:45,442 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:46,311 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:12:46,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:46,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:46,311 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:12:46,312 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:12:46,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:46,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:12:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:12:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:46,716 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:46,716 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:46,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:46,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:46,717 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:46,717 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:46,717 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-10-01 01:12:46,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:46,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:46,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:46,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:46,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:46,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:46,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:46,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:46,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:46,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:46,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:46,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:46,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:46,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:46,850 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:46,850 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:47,713 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:12:47,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:47,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:47,714 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:47,714 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:47,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:12:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:48,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:48,130 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:48,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:48,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:48,130 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:48,130 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:48,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-10-01 01:12:48,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:48,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:48,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:48,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:48,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:48,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:48,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:48,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:48,216 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:12:48,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:48,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:48,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:48,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:48,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:48,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:48,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:48,274 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:49,119 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:12:49,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:49,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:49,120 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:12:49,120 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:12:49,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:12:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 01:12:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:12:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:12:49,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:12:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:49,504 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:12:49,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:12:49,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:49,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:49,505 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:49,505 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:49,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-10-01 01:12:49,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:49,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:49,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:49,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:49,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:49,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:49,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:49,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:49,608 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:49,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:49,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:49,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:49,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:49,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:49,694 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:49,694 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:12:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:50,517 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:12:50,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:50,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:50,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:50,518 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:12:50,518 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:12:50,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:12:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:12:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:50,952 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:50,952 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:50,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:50,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:50,952 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:50,952 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:50,952 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-10-01 01:12:50,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:50,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:50,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:50,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:50,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:51,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:51,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:51,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:51,157 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:12:51,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:51,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:51,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:51,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:51,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:51,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:51,202 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:51,202 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:52,019 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:12:52,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:52,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:52,020 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:12:52,020 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:12:52,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:12:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:12:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 01:12:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:52,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:52,426 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:52,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:52,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:52,426 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:52,427 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:52,427 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:52,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-10-01 01:12:52,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:52,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:52,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:52,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:52,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:52,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:52,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:52,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:52,502 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:12:52,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:52,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:52,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:52,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:52,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:52,568 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:52,568 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:53,365 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:12:53,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:53,365 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:53,365 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:12:53,366 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:12:53,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:12:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:12:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:53,783 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:53,783 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:53,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:53,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:53,783 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:53,783 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:53,784 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-10-01 01:12:53,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:53,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:53,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:53,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:53,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:53,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:53,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:53,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:53,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:54,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:54,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:54,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:54,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:54,003 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:54,003 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:54,763 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:12:54,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:54,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:54,764 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:12:54,764 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:12:54,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:12:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-01 01:12:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:12:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:12:55,127 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:12:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:55,127 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:12:55,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:12:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:55,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:55,128 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:55,128 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:55,128 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-10-01 01:12:55,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:55,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:55,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:55,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:55,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:55,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:55,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:55,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:55,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:55,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:55,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:55,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:55,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:55,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:55,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:55,268 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:12:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:56,126 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:12:56,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:56,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:56,126 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:56,126 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:56,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:12:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:12:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:56,544 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:56,544 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:56,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:56,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:56,544 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:56,545 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:56,545 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-10-01 01:12:56,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:56,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:56,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:56,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:56,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:56,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:56,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:56,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:56,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:12:56,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:56,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:56,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:56,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:56,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:56,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:56,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:56,703 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:12:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:57,581 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:12:57,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:57,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:57,582 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:12:57,582 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:12:57,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:12:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 01:12:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:12:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:12:58,000 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:12:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:58,000 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:12:58,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:12:58,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:58,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:58,000 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:12:58,000 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:58,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-10-01 01:12:58,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:58,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:58,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:58,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:58,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:58,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:58,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:58,066 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:58,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:58,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:58,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:58,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:58,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:58,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:58,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:58,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:58,183 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:12:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:59,078 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:12:59,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:12:59,078 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:12:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:59,079 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:59,079 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:59,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:12:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:12:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:12:59,501 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:12:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:59,501 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:12:59,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:12:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:12:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:12:59,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:59,502 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:12:59,502 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:59,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-10-01 01:12:59,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:59,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:59,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:59,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:59,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:59,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:59,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:12:59,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:59,575 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:12:59,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:59,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:59,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:59,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:12:59,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:12:59,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:12:59,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:59,643 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:00,498 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:13:00,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:00,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:00,498 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:13:00,498 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:13:00,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:13:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 01:13:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:13:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:13:00,885 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:13:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:00,885 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:13:00,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:13:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:00,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:00,885 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:00,886 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:00,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-10-01 01:13:00,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:00,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:00,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:00,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:00,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:00,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:00,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:00,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:00,959 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:13:00,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:00,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:01,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:01,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:01,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:01,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:01,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:01,015 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:13:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:01,821 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:13:01,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:01,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:01,821 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:13:01,821 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:13:01,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:13:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:13:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:02,241 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:02,241 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:02,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:02,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:02,241 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:02,241 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:02,241 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-10-01 01:13:02,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:02,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:02,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:02,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:02,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:02,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:02,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:02,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:02,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:02,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:02,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:02,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:02,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:02,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:02,376 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:03,185 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:13:03,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:03,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:03,186 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:13:03,186 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:13:03,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:13:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 01:13:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:13:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:13:03,599 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:13:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:03,600 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:13:03,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:13:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:03,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:03,600 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:03,600 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:03,600 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-10-01 01:13:03,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:03,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:03,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:03,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:03,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:03,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:03,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:03,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:03,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:03,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:03,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:03,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:03,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:03,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:03,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:03,739 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:13:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:04,511 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:13:04,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:04,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:04,512 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:13:04,512 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:13:04,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:13:04,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:13:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:04,938 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:04,938 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:04,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:04,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:04,939 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:04,939 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:04,939 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:04,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-10-01 01:13:04,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:04,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:04,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:04,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:04,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:04,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:04,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:05,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:05,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:13:05,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:05,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:05,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:05,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:05,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:05,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:05,063 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:05,064 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:05,836 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:13:05,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:05,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:05,837 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:13:05,837 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:13:05,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:13:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-01 01:13:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:13:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:13:06,163 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 01:13:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:06,163 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:13:06,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:13:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:06,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:06,164 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:06,164 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:06,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:06,164 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-10-01 01:13:06,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:06,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:06,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:06,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:06,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:06,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:06,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:06,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:06,237 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:06,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:06,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:06,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:06,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:06,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:06,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:06,289 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 01:13:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:07,100 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:13:07,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:07,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:07,101 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:13:07,101 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:13:07,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:13:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:13:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:07,548 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:07,548 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:07,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:07,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:07,549 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:07,549 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:07,549 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:07,549 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-10-01 01:13:07,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:07,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:07,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:07,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:07,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:07,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:07,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:07,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:07,636 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:13:07,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:07,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:07,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:07,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:07,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:07,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:07,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:07,716 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:08,501 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:13:08,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:08,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:08,502 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:13:08,502 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:13:08,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:13:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 01:13:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:13:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:13:08,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:13:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:08,930 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:13:08,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:13:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:08,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:08,930 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:08,930 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:08,931 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-10-01 01:13:08,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:08,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:08,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:08,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:08,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:08,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:08,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:08,996 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:09,005 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:13:09,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:09,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:09,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:09,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:09,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:09,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:09,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:09,078 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:13:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:09,841 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:13:09,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:09,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:09,842 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:13:09,842 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:13:09,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:13:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-01 01:13:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:10,278 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:10,278 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:10,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:10,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:10,279 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:10,279 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:10,279 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:10,279 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-10-01 01:13:10,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:10,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:10,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:10,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:10,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:10,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:10,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:10,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:10,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:10,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:10,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:10,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:10,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:10,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:10,418 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:11,137 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:13:11,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:11,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:11,137 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:13:11,137 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:13:11,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:13:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 01:13:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:13:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:13:11,538 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:13:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:11,538 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:13:11,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:13:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:11,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:11,538 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:11,538 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:11,538 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-10-01 01:13:11,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:11,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:11,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:11,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:11,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:11,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:11,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:11,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:11,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:11,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:11,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:11,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:11,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:11,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:11,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:11,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:11,673 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:13:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:12,462 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:13:12,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:12,462 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:12,463 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:13:12,463 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:13:12,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:13:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:13:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:12,895 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:12,895 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:12,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:12,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:12,896 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:12,896 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:12,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-10-01 01:13:12,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:12,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:12,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:12,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:12,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:12,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:12,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:12,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:12,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:13:12,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:12,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:13,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:13,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:13,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:13,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:13,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:13,030 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:13,818 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:13:13,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:13,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:13,819 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:13:13,819 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:13:13,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:13:14,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 01:13:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:13:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:13:14,242 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:13:14,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:14,242 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:13:14,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:14,242 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:13:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:14,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:14,242 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:14,242 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:14,243 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:14,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-10-01 01:13:14,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:14,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:14,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:14,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:14,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:14,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:14,311 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:14,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:14,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:14,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:14,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:14,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:14,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:14,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:14,380 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:13:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:15,182 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:13:15,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:15,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:15,183 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:13:15,183 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:13:15,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:13:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-01 01:13:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:15,633 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:15,634 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:15,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:15,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:15,634 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:15,634 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:15,634 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:15,634 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-10-01 01:13:15,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:15,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:15,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:15,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:15,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:15,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:15,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:15,699 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:15,709 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:13:15,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:15,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:15,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:15,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:15,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:15,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:15,769 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:16,552 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:13:16,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:16,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:16,553 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:13:16,553 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:13:16,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:13:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 01:13:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:13:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:13:16,929 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:13:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:16,929 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:13:16,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:13:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:16,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:16,929 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:16,930 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:16,930 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-10-01 01:13:16,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:16,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:16,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:16,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:16,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:16,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:16,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:16,994 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:17,003 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:13:17,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:17,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:17,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:17,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:17,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:17,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:17,125 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:13:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:17,841 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:13:17,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:17,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:17,842 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:13:17,842 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:13:17,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:13:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-01 01:13:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:18,277 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:18,277 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:18,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:18,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:18,278 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:18,278 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:18,278 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-10-01 01:13:18,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:18,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:18,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:18,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:18,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:18,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:18,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:18,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:18,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:18,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:18,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:18,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:18,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:18,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:18,413 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:19,120 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:13:19,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:19,120 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:19,121 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:13:19,121 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:13:19,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:13:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-01 01:13:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:13:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:13:19,555 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:13:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:19,555 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:13:19,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:13:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:19,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:19,556 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:19,556 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:19,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-10-01 01:13:19,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:19,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:19,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:19,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:19,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:19,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:19,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:19,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:19,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:19,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:19,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:19,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:19,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:19,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:19,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:19,681 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:13:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:20,511 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:13:20,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:20,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:20,512 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:13:20,512 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:13:20,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:13:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-01 01:13:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:20,984 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:20,984 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:20,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:20,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:20,984 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:20,985 INFO L423 AbstractCegarLoop]: === Iteration 379 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:20,985 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1126304964, now seen corresponding path program 363 times [2018-10-01 01:13:20,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:20,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:20,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:20,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:20,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:21,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:21,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:21,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:21,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:13:21,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:21,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:21,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:21,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:21,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:21,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:21,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:21,151 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:21,911 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:13:21,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:21,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:21,911 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:13:21,911 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:13:21,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:13:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 01:13:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:13:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:13:22,325 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:13:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:22,326 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:13:22,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:13:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:22,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:22,326 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:22,326 INFO L423 AbstractCegarLoop]: === Iteration 380 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:22,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:22,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1395503934, now seen corresponding path program 364 times [2018-10-01 01:13:22,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:22,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:22,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:22,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:22,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:22,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:22,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:22,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:22,394 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:22,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:22,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:22,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:22,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:22,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:22,460 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:22,461 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:13:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:23,130 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:13:23,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:23,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:23,131 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:13:23,131 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:13:23,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:13:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-10-01 01:13:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:23,581 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:23,582 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:23,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:23,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:23,582 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:23,582 INFO L423 AbstractCegarLoop]: === Iteration 381 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:23,585 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1395502012, now seen corresponding path program 365 times [2018-10-01 01:13:23,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:23,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:23,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:23,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:23,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:23,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:23,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:23,648 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:23,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:13:23,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:23,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:23,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:23,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:23,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:23,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:23,712 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:24,381 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:13:24,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:24,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:24,382 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:13:24,382 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:13:24,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:13:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-01 01:13:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:13:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:13:24,808 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:13:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:24,808 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:13:24,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:13:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:24,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:24,808 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:24,809 INFO L423 AbstractCegarLoop]: === Iteration 382 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:24,809 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1393656892, now seen corresponding path program 366 times [2018-10-01 01:13:24,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:24,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:24,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:24,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:24,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:24,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:24,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:24,878 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:24,892 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:13:24,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:24,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:24,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:24,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:24,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:24,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:24,959 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:24,959 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:13:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:25,631 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 01:13:25,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:25,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:25,632 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:13:25,632 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:13:25,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:13:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-10-01 01:13:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:26,077 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:26,077 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:26,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:26,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:26,077 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:13:26,077 INFO L423 AbstractCegarLoop]: === Iteration 383 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:26,077 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:26,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1393654970, now seen corresponding path program 367 times [2018-10-01 01:13:26,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:26,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:26,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:26,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:26,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:26,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:26,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:26,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:26,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:26,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:26,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:26,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:26,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:26,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:26,244 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:26,906 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-10-01 01:13:26,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:26,907 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:26,907 INFO L225 Difference]: With dead ends: 38 [2018-10-01 01:13:26,907 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 01:13:26,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 01:13:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-10-01 01:13:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:13:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:13:27,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-01 01:13:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:27,175 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:13:27,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:13:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:27,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:27,176 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:13:27,176 INFO L423 AbstractCegarLoop]: === Iteration 384 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:27,176 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash 21654842, now seen corresponding path program 368 times [2018-10-01 01:13:27,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:27,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:27,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:27,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:27,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:27,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:27,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:27,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:27,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:27,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:27,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:27,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:27,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:27,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:27,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:27,332 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-10-01 01:13:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:28,586 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:13:28,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:28,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:28,587 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:13:28,587 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:13:28,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:13:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:13:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:29,102 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:29,103 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:29,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:29,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:29,103 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:29,103 INFO L423 AbstractCegarLoop]: === Iteration 385 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:29,103 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:29,104 INFO L82 PathProgramCache]: Analyzing trace with hash 21656764, now seen corresponding path program 369 times [2018-10-01 01:13:29,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:29,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:29,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:29,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:29,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:29,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:29,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:29,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:29,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:13:29,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:29,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:29,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:29,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:29,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:29,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:29,240 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:13:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:30,520 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:13:30,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:30,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:30,520 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:13:30,521 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:13:30,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:13:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2018-10-01 01:13:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:31,036 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:31,036 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:31,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:31,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:31,036 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:31,036 INFO L423 AbstractCegarLoop]: === Iteration 386 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:31,037 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash 23501884, now seen corresponding path program 370 times [2018-10-01 01:13:31,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:31,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:31,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:31,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:31,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:31,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:31,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:31,098 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:31,104 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:31,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:31,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:31,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:31,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:31,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:31,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:31,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:31,184 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:32,513 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:13:32,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:32,513 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:32,513 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:13:32,513 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:13:32,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:13:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:13:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:33,028 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:33,028 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:33,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:33,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:33,028 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:33,028 INFO L423 AbstractCegarLoop]: === Iteration 387 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:33,028 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash 23503806, now seen corresponding path program 371 times [2018-10-01 01:13:33,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:33,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:33,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:33,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:33,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:33,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:33,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:33,092 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:33,101 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:13:33,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:33,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:33,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:33,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:33,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:33,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:33,157 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:13:34,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:34,447 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:13:34,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:34,447 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:34,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:34,448 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:13:34,448 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:13:34,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:13:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2018-10-01 01:13:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:13:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:13:34,934 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:13:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:34,934 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:13:34,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:13:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:34,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:34,935 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:34,935 INFO L423 AbstractCegarLoop]: === Iteration 388 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:34,935 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1796662204, now seen corresponding path program 372 times [2018-10-01 01:13:34,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:34,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:34,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:34,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:34,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:34,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:34,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:34,999 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:35,008 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:13:35,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:35,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:35,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:35,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:35,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:35,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:35,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:35,078 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:13:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:36,308 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:13:36,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:36,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:36,308 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:13:36,308 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:13:36,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:13:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 01:13:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:36,829 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:36,830 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:36,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:36,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:36,830 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:36,830 INFO L423 AbstractCegarLoop]: === Iteration 389 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:36,830 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:36,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1796664126, now seen corresponding path program 373 times [2018-10-01 01:13:36,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:36,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:36,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:36,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:36,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:36,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:36,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:36,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:36,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:36,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:36,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:36,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:36,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:36,954 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:13:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:38,197 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:13:38,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:38,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:38,198 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:13:38,198 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:13:38,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:13:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-10-01 01:13:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:38,714 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:38,714 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:38,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:38,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:38,715 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:38,715 INFO L423 AbstractCegarLoop]: === Iteration 390 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:38,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1798509246, now seen corresponding path program 374 times [2018-10-01 01:13:38,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:38,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:38,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:38,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:38,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:38,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:38,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:38,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:38,807 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:38,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:38,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:38,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:38,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:38,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:38,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:38,853 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:38,853 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:40,058 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:13:40,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:40,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:40,059 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:13:40,059 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:13:40,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:13:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:13:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:40,576 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:40,576 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:40,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:40,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:40,577 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:40,577 INFO L423 AbstractCegarLoop]: === Iteration 391 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:40,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1798511168, now seen corresponding path program 375 times [2018-10-01 01:13:40,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:40,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:40,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:40,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:40,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:40,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:40,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:40,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:40,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:13:40,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:40,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:40,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:40,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:40,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:40,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:40,715 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:13:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:41,880 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:13:41,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:41,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:41,881 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:13:41,881 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:13:41,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:13:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 30. [2018-10-01 01:13:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:13:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:13:42,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:13:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:42,325 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:13:42,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:13:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:42,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:42,325 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:42,325 INFO L423 AbstractCegarLoop]: === Iteration 392 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:42,325 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:42,325 INFO L82 PathProgramCache]: Analyzing trace with hash 701713212, now seen corresponding path program 376 times [2018-10-01 01:13:42,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:42,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:42,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:42,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:42,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:42,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:42,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:42,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:42,420 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:42,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:42,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:42,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:42,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:42,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:42,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:42,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:42,478 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:13:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:43,773 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:13:43,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:43,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:43,774 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:13:43,774 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:13:43,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:13:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:13:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:44,294 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:44,294 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:44,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:44,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:44,294 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:44,295 INFO L423 AbstractCegarLoop]: === Iteration 393 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:44,295 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:44,295 INFO L82 PathProgramCache]: Analyzing trace with hash 701715134, now seen corresponding path program 377 times [2018-10-01 01:13:44,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:44,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:44,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:44,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:44,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:44,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:44,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:44,360 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:44,370 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:13:44,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:44,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:44,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:44,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:44,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:44,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:44,427 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:44,427 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:13:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:45,687 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:13:45,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:45,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:45,688 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:13:45,688 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:13:45,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:45,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:13:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2018-10-01 01:13:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:46,196 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:46,196 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:46,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:46,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:46,197 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:46,197 INFO L423 AbstractCegarLoop]: === Iteration 394 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:46,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:46,197 INFO L82 PathProgramCache]: Analyzing trace with hash 703560254, now seen corresponding path program 378 times [2018-10-01 01:13:46,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:46,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:46,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:46,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:46,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:46,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:46,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:46,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:46,287 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:13:46,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:46,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:46,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:46,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:46,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:46,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:46,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:46,352 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:47,656 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:13:47,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:47,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:47,657 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:13:47,657 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:13:47,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:13:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:13:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:48,176 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:48,176 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:48,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:48,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:48,177 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:48,177 INFO L423 AbstractCegarLoop]: === Iteration 395 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:48,177 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash 703562176, now seen corresponding path program 379 times [2018-10-01 01:13:48,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:48,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:48,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:48,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:48,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:48,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:48,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:48,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:48,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:48,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:48,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:48,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:48,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:48,309 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:13:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:49,565 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:13:49,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:49,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:49,566 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:13:49,566 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:13:49,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:13:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2018-10-01 01:13:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:13:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:13:50,052 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:13:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:50,052 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:13:50,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:13:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:50,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:50,053 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:50,053 INFO L423 AbstractCegarLoop]: === Iteration 396 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:50,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1818246722, now seen corresponding path program 380 times [2018-10-01 01:13:50,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:50,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:50,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:50,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:50,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:50,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:50,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:50,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:50,118 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:50,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:50,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:50,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:50,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:50,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:50,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:50,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:50,186 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:13:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:51,411 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:13:51,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:51,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:51,411 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:13:51,412 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:13:51,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:13:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 01:13:51,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:51,939 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:51,939 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:51,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:51,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:51,939 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:51,939 INFO L423 AbstractCegarLoop]: === Iteration 397 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:51,939 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1818244800, now seen corresponding path program 381 times [2018-10-01 01:13:51,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:51,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:51,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:51,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:51,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:52,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:52,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:52,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:52,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:13:52,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:52,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:52,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:52,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:52,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:52,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:52,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:52,190 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:13:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:53,501 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:13:53,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:53,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:53,502 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:13:53,502 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:13:53,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:13:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:13:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-10-01 01:13:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:13:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:13:54,017 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:13:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:54,017 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:13:54,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:13:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:54,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:54,018 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:13:54,018 INFO L423 AbstractCegarLoop]: === Iteration 398 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:54,018 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1816399680, now seen corresponding path program 382 times [2018-10-01 01:13:54,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:54,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:54,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:54,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:54,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:54,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:54,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:54,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:54,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:54,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:54,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:54,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:54,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:54,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:54,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:54,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:54,144 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:13:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:55,377 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:13:55,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:55,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:55,378 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:13:55,378 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:13:55,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:13:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:13:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:55,911 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:55,911 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:55,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:55,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:55,912 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:55,912 INFO L423 AbstractCegarLoop]: === Iteration 399 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:55,912 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:55,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1816397758, now seen corresponding path program 383 times [2018-10-01 01:13:55,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:55,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:55,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:55,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:55,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:55,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:55,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:55,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:56,006 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:13:56,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:56,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:56,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:56,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:56,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:56,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:56,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:56,077 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:13:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:57,222 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:13:57,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:57,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:57,222 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:13:57,222 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:13:57,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:13:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 28. [2018-10-01 01:13:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:13:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:13:57,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:13:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:57,630 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:13:57,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:13:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:57,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:57,631 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:13:57,631 INFO L423 AbstractCegarLoop]: === Iteration 400 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:57,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash 722719420, now seen corresponding path program 384 times [2018-10-01 01:13:57,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:57,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:57,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:57,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:57,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:57,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:57,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:57,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:57,701 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:13:57,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:57,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:57,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:57,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:57,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:57,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:57,769 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:13:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:58,967 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:13:58,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:13:58,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:13:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:58,968 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:13:58,968 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:13:58,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:13:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:13:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:13:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:13:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:13:59,502 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:13:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:59,502 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:13:59,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:13:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:13:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:13:59,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:59,502 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:13:59,502 INFO L423 AbstractCegarLoop]: === Iteration 401 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:59,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash 722721342, now seen corresponding path program 385 times [2018-10-01 01:13:59,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:59,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:59,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:59,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:59,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:59,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:59,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:59,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:59,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:59,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:59,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:13:59,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:13:59,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:13:59,637 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:59,637 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:00,857 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:14:00,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:00,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:00,858 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:14:00,858 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:14:00,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:14:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2018-10-01 01:14:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:14:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:14:01,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:14:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:01,386 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:14:01,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:14:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:01,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:01,386 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:01,386 INFO L423 AbstractCegarLoop]: === Iteration 402 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:01,386 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 724566462, now seen corresponding path program 386 times [2018-10-01 01:14:01,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:01,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:01,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:01,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:01,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:01,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:01,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:01,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:14:01,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:14:01,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:01,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:01,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:01,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:01,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:01,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:01,508 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:14:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:02,667 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:14:02,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:02,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:02,668 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:14:02,668 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:14:02,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:14:03,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 01:14:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:03,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:03,195 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:03,196 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:03,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:03,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:03,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:03,196 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:03,196 INFO L423 AbstractCegarLoop]: === Iteration 403 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:03,196 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:03,196 INFO L82 PathProgramCache]: Analyzing trace with hash 724568384, now seen corresponding path program 387 times [2018-10-01 01:14:03,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:03,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:03,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:03,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:03,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:03,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:03,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:03,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:14:03,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:14:03,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:03,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:03,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:03,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:03,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:03,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:03,323 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:04,482 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:14:04,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:04,482 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:04,483 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:14:04,483 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:14:04,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:14:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:14:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:14:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:14:04,987 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:14:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:04,987 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:14:04,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:14:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:04,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:04,988 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:04,988 INFO L423 AbstractCegarLoop]: === Iteration 404 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:04,988 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1797240514, now seen corresponding path program 388 times [2018-10-01 01:14:04,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:04,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:04,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:04,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:04,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:05,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:05,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:05,050 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:14:05,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:14:05,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:05,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:05,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:05,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:05,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:05,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:05,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:05,122 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:14:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:06,345 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:14:06,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:06,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:06,346 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:14:06,346 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:14:06,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:14:06,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:14:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:06,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:06,880 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:06,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:06,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:06,880 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:06,880 INFO L423 AbstractCegarLoop]: === Iteration 405 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:06,881 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:06,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1797238592, now seen corresponding path program 389 times [2018-10-01 01:14:06,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:06,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:06,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:06,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:06,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:06,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:06,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:06,943 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:14:06,952 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:14:06,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:06,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:07,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:07,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:07,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:07,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:07,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:07,041 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:08,298 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:14:08,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:08,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:08,299 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:14:08,299 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:14:08,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:14:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:14:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2018-10-01 01:14:08,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:14:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:14:08,822 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:14:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:08,823 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:14:08,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:14:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:08,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:08,823 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:08,823 INFO L423 AbstractCegarLoop]: === Iteration 406 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:08,823 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:08,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1795393472, now seen corresponding path program 390 times [2018-10-01 01:14:08,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:08,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:08,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:08,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:08,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:08,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:08,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:08,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:14:08,899 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:14:08,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:08,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:08,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:08,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:08,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:08,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:08,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:08,956 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:14:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:10,123 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:14:10,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:10,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:10,124 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:14:10,124 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:14:10,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:14:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 01:14:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:10,658 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:10,658 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:10,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:10,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:10,658 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:10,658 INFO L423 AbstractCegarLoop]: === Iteration 407 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:10,658 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:10,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1795391550, now seen corresponding path program 391 times [2018-10-01 01:14:10,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:10,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:10,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:10,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:10,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:10,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:10,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:10,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:10,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:10,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:10,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:10,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:10,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:10,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:10,790 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:11,949 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:14:11,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:11,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:11,950 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:14:11,950 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:14:11,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:14:12,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2018-10-01 01:14:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:14:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:14:12,414 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:14:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:12,414 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:14:12,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:14:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:12,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:12,414 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:12,414 INFO L423 AbstractCegarLoop]: === Iteration 408 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:12,414 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1402777790, now seen corresponding path program 392 times [2018-10-01 01:14:12,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:12,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:12,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:12,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:12,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:12,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:12,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:12,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:14:12,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:14:12,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:12,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:12,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:12,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:12,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:12,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:12,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:12,563 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:14:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:13,705 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:14:13,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:13,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:13,706 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:14:13,706 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:14:13,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:14:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:14:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:14:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:14,252 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:14,252 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:14,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:14,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:14,252 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:14,253 INFO L423 AbstractCegarLoop]: === Iteration 409 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:14,253 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1402779712, now seen corresponding path program 393 times [2018-10-01 01:14:14,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:14,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:14,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:14,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:14,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:14,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:14,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:14,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:14:14,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:14:14,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:14,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:14,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:14,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:14,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:14,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:14,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:14,393 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:15,523 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:14:15,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:15,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:15,523 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:14:15,524 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:14:15,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:14:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:14:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:14:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:14:16,051 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:14:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:16,051 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:14:16,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:16,051 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:14:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:16,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:16,051 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:16,051 INFO L423 AbstractCegarLoop]: === Iteration 410 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:16,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:16,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1404624832, now seen corresponding path program 394 times [2018-10-01 01:14:16,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:16,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:16,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:16,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:16,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:16,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:16,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:16,115 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:14:16,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:14:16,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:16,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:16,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:16,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:16,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:16,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:16,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:16,184 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:14:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:17,278 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:14:17,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:17,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:17,279 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:14:17,279 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:14:17,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:14:17,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:14:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:17,817 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:17,817 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:17,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:17,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:17,817 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:17,817 INFO L423 AbstractCegarLoop]: === Iteration 411 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:17,817 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1404626754, now seen corresponding path program 395 times [2018-10-01 01:14:17,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:17,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:17,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:17,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:17,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:17,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:17,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:17,882 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:14:17,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:14:17,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:17,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:17,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:17,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:17,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:17,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:17,958 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:19,073 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:14:19,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:19,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:19,073 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:14:19,074 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:14:19,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:14:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 01:14:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:14:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:14:19,590 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:14:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:19,590 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:14:19,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:14:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:19,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:19,591 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:19,591 INFO L423 AbstractCegarLoop]: === Iteration 412 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:19,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1117182144, now seen corresponding path program 396 times [2018-10-01 01:14:19,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:19,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:19,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:19,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:19,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:19,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:19,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:19,653 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:14:19,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:14:19,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:19,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:19,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:19,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:19,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:19,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:19,718 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:14:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:20,772 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:14:20,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:20,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:20,772 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:14:20,773 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:14:20,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:14:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:14:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:21,315 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:21,315 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:21,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:21,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:21,315 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:21,315 INFO L423 AbstractCegarLoop]: === Iteration 413 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:21,316 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1117180222, now seen corresponding path program 397 times [2018-10-01 01:14:21,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:21,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:21,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:21,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:21,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:21,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:21,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:21,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:21,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:21,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:21,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:21,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:21,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:21,450 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:22,512 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:14:22,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:22,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:22,513 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:14:22,513 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:14:22,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:14:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:14:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:14:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:14:23,040 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:14:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:23,040 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:14:23,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:14:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:23,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:23,041 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:23,041 INFO L423 AbstractCegarLoop]: === Iteration 414 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:23,041 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1115335102, now seen corresponding path program 398 times [2018-10-01 01:14:23,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:23,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:23,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:23,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:23,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:23,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:23,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:23,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:14:23,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:14:23,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:23,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:23,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:23,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:23,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:23,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:23,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:23,166 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:14:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:24,210 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:14:24,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:24,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:24,210 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:14:24,211 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:14:24,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:14:24,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 01:14:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:24,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:24,754 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:24,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:24,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:24,754 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:14:24,755 INFO L423 AbstractCegarLoop]: === Iteration 415 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:24,755 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:24,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1115333180, now seen corresponding path program 399 times [2018-10-01 01:14:24,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:24,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:24,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:24,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:24,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:24,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:24,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:24,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:14:24,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:14:24,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:24,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:24,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:24,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:24,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:24,894 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:24,894 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:25,909 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:14:25,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:25,909 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:25,910 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:14:25,910 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:14:25,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:14:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2018-10-01 01:14:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:14:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:14:26,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 01:14:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:26,287 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:14:26,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:14:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:26,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:26,287 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:14:26,288 INFO L423 AbstractCegarLoop]: === Iteration 416 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:26,288 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:26,288 INFO L82 PathProgramCache]: Analyzing trace with hash -565151172, now seen corresponding path program 400 times [2018-10-01 01:14:26,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:26,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:26,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:26,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:26,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:26,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:26,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:26,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:14:26,360 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:14:26,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:26,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:26,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:26,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:26,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:26,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:26,424 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 01:14:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:27,820 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:14:27,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:27,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:27,820 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:14:27,820 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:14:27,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:14:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:14:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:28,380 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:28,381 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:28,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:28,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:28,381 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:28,381 INFO L423 AbstractCegarLoop]: === Iteration 417 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:28,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash -565149250, now seen corresponding path program 401 times [2018-10-01 01:14:28,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:28,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:28,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:28,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:28,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:28,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:28,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:28,443 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:14:28,454 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:14:28,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:28,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:28,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:28,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:28,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:28,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:28,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:28,525 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:29,885 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:14:29,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:29,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:29,886 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:14:29,886 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:14:29,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:14:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2018-10-01 01:14:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:14:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:14:30,436 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:14:30,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:30,436 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:14:30,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:14:30,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:30,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:30,436 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:30,436 INFO L423 AbstractCegarLoop]: === Iteration 418 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:30,436 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash -563304130, now seen corresponding path program 402 times [2018-10-01 01:14:30,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:30,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:30,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:30,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:30,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:30,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:30,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:30,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:14:30,507 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:14:30,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:30,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:30,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:30,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:30,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:30,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:30,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:30,572 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:14:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:31,988 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:14:31,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:31,988 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:31,989 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:14:31,989 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:14:31,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:14:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:14:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:32,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:32,551 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:32,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:32,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:32,551 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:32,552 INFO L423 AbstractCegarLoop]: === Iteration 419 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:32,552 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:32,552 INFO L82 PathProgramCache]: Analyzing trace with hash -563302208, now seen corresponding path program 403 times [2018-10-01 01:14:32,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:32,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:32,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:32,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:32,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:32,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:32,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:32,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:32,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:32,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:32,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:32,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:32,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:32,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:32,802 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:34,175 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:14:34,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:34,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:34,175 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:14:34,176 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:14:34,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:14:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:14:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2018-10-01 01:14:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:14:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:14:34,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:14:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:34,696 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:14:34,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:14:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:34,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:34,696 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:34,696 INFO L423 AbstractCegarLoop]: === Iteration 420 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:34,696 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1209856190, now seen corresponding path program 404 times [2018-10-01 01:14:34,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:34,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:34,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:34,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:34,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:34,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:34,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:34,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:14:34,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:14:34,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:34,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:34,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:34,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:34,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:34,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:34,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:34,835 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:14:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:36,147 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:14:36,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:36,147 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:36,147 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:14:36,148 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:14:36,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:14:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 01:14:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:36,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:36,712 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:36,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:36,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:36,712 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:36,712 INFO L423 AbstractCegarLoop]: === Iteration 421 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:36,712 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:36,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1209858112, now seen corresponding path program 405 times [2018-10-01 01:14:36,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:36,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:36,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:36,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:36,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:36,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:36,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:36,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:14:36,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:14:36,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:36,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:36,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:36,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:36,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:36,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:36,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:36,841 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:38,165 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:14:38,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:38,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:38,166 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:14:38,166 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:14:38,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:14:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-10-01 01:14:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:14:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:14:38,731 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:14:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:38,731 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:14:38,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:14:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:38,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:38,731 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:38,731 INFO L423 AbstractCegarLoop]: === Iteration 422 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:38,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:38,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1211703232, now seen corresponding path program 406 times [2018-10-01 01:14:38,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:38,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:38,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:38,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:38,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:38,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:38,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:38,792 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:14:38,797 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:14:38,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:38,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:38,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:38,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:38,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:38,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:38,855 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:14:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:40,158 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:14:40,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:40,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:40,158 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:14:40,159 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:14:40,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:14:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:14:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:40,720 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:40,721 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:40,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:40,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:40,721 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:40,721 INFO L423 AbstractCegarLoop]: === Iteration 423 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:40,721 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:40,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1211705154, now seen corresponding path program 407 times [2018-10-01 01:14:40,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:40,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:40,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:40,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:40,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:40,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:40,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:40,784 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:14:40,793 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:14:40,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:40,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:40,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:40,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:40,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:40,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:40,856 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:42,100 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:14:42,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:42,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:42,101 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:14:42,101 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:14:42,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:14:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 30. [2018-10-01 01:14:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:14:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:14:42,596 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:14:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:42,596 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:14:42,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:14:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:42,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:42,596 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:42,596 INFO L423 AbstractCegarLoop]: === Iteration 424 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:42,597 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash 114907198, now seen corresponding path program 408 times [2018-10-01 01:14:42,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:42,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:42,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:42,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:42,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:42,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:42,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:42,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:14:42,668 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:14:42,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:42,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:42,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:42,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:42,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:42,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:42,736 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:14:44,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:44,132 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:14:44,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:44,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:44,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:44,133 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:14:44,133 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:14:44,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:14:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:14:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:44,700 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:44,700 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:44,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:44,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:44,701 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:44,701 INFO L423 AbstractCegarLoop]: === Iteration 425 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:44,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash 114909120, now seen corresponding path program 409 times [2018-10-01 01:14:44,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:44,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:44,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:44,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:44,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:44,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:44,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:44,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:44,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:44,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:44,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:44,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:44,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:44,889 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:46,277 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:14:46,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:46,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:46,278 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:14:46,278 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:14:46,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:14:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:14:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2018-10-01 01:14:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:14:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:14:46,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:14:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:46,833 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:14:46,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:14:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:46,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:46,833 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:46,833 INFO L423 AbstractCegarLoop]: === Iteration 426 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:46,833 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:46,834 INFO L82 PathProgramCache]: Analyzing trace with hash 116754240, now seen corresponding path program 410 times [2018-10-01 01:14:46,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:46,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:46,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:46,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:46,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:46,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:46,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:46,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:14:46,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:14:46,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:46,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:46,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:46,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:46,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:46,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:46,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:46,960 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:14:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:48,355 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:14:48,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:48,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:48,356 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:14:48,356 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:14:48,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:14:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:14:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:48,923 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:48,923 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:48,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:48,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:48,923 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:48,923 INFO L423 AbstractCegarLoop]: === Iteration 427 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:48,923 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash 116756162, now seen corresponding path program 411 times [2018-10-01 01:14:48,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:48,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:48,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:48,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:48,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:48,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:48,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:48,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:14:48,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:14:48,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:48,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:49,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:49,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:49,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:49,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:49,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:49,066 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:50,431 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:14:50,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:50,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:50,432 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:14:50,432 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:14:50,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:14:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:14:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2018-10-01 01:14:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:14:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:14:50,961 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:14:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:50,962 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:14:50,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:14:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:50,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:50,962 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:14:50,962 INFO L423 AbstractCegarLoop]: === Iteration 428 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:50,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1889914560, now seen corresponding path program 412 times [2018-10-01 01:14:50,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:50,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:50,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:50,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:50,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:51,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:51,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:51,027 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:14:51,032 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:14:51,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:51,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:51,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:51,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:51,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:51,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:51,096 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:14:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:52,433 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:14:52,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:52,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:52,434 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:14:52,434 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:14:52,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:14:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 01:14:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:53,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:53,004 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:53,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:53,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:53,005 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:53,005 INFO L423 AbstractCegarLoop]: === Iteration 429 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:53,005 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:53,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1889916482, now seen corresponding path program 413 times [2018-10-01 01:14:53,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:53,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:53,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:53,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:53,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:53,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:53,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:53,093 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:14:53,105 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:14:53,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:53,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:53,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:53,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:53,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:53,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:53,177 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:54,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:54,555 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:14:54,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:54,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:54,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:54,556 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:14:54,556 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:14:54,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:14:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:14:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-10-01 01:14:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:14:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:14:55,113 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:14:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:55,113 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:14:55,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:14:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:55,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:55,114 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:55,114 INFO L423 AbstractCegarLoop]: === Iteration 430 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:55,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1891761602, now seen corresponding path program 414 times [2018-10-01 01:14:55,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:55,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:55,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:55,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:55,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:55,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:55,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:55,178 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:14:55,188 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:14:55,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:55,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:55,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:55,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:55,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:55,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:55,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:55,243 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:14:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:56,516 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:14:56,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:56,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:56,517 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:14:56,517 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:14:56,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:14:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:14:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:14:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:14:57,091 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:14:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:57,091 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:14:57,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:14:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:57,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:57,091 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:14:57,092 INFO L423 AbstractCegarLoop]: === Iteration 431 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:57,092 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1891763524, now seen corresponding path program 415 times [2018-10-01 01:14:57,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:57,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:57,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:57,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:57,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:57,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:57,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:57,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:57,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:57,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:57,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:57,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:57,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:57,237 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:14:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:58,475 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:14:58,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:14:58,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:14:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:58,476 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:14:58,476 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:14:58,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:14:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:14:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 28. [2018-10-01 01:14:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:14:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:14:58,914 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:14:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:58,915 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:14:58,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:14:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:14:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:14:58,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:58,915 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:14:58,915 INFO L423 AbstractCegarLoop]: === Iteration 432 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:58,915 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:58,915 INFO L82 PathProgramCache]: Analyzing trace with hash 135913406, now seen corresponding path program 416 times [2018-10-01 01:14:58,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:58,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:58,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:58,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:58,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:58,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:58,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:58,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:14:58,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:14:58,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:58,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:59,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:59,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:14:59,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:14:59,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:14:59,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:59,054 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:15:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:00,359 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:15:00,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:00,359 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:00,360 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:15:00,360 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:15:00,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:15:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:15:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:00,938 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:00,938 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:00,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:00,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:00,939 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:00,939 INFO L423 AbstractCegarLoop]: === Iteration 433 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:00,939 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash 135915328, now seen corresponding path program 417 times [2018-10-01 01:15:00,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:00,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:00,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:00,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:00,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:00,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:00,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:01,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:15:01,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:15:01,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:01,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:01,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:01,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:01,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:01,076 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:01,076 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:02,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:02,391 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:15:02,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:02,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:02,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:02,392 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:15:02,392 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:15:02,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:15:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2018-10-01 01:15:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:15:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:15:02,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:15:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:02,962 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:15:02,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:02,962 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:15:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:02,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:02,962 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:02,962 INFO L423 AbstractCegarLoop]: === Iteration 434 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:02,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:02,962 INFO L82 PathProgramCache]: Analyzing trace with hash 137760448, now seen corresponding path program 418 times [2018-10-01 01:15:02,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:02,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:02,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:02,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:02,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:03,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:03,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:03,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:15:03,029 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:15:03,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:03,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:03,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:03,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:03,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:03,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:03,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:03,085 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:15:04,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:04,369 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:15:04,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:04,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:04,370 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:15:04,370 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:15:04,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:15:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 01:15:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:04,949 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:04,949 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:04,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:04,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:04,950 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:04,950 INFO L423 AbstractCegarLoop]: === Iteration 435 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:04,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:04,950 INFO L82 PathProgramCache]: Analyzing trace with hash 137762370, now seen corresponding path program 419 times [2018-10-01 01:15:04,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:04,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:04,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:04,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:04,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:05,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:05,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:05,016 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:15:05,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:15:05,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:05,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:05,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:05,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:05,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:05,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:05,091 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:06,332 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:15:06,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:06,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:06,332 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:15:06,332 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:15:06,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:15:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:15:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:15:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:15:06,873 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:15:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:06,873 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:15:06,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:15:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:06,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:06,873 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:06,874 INFO L423 AbstractCegarLoop]: === Iteration 436 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:06,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:06,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1910920768, now seen corresponding path program 420 times [2018-10-01 01:15:06,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:06,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:06,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:06,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:06,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:06,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:06,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:06,945 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:15:06,953 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:15:06,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:06,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:07,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:07,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:07,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:07,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:07,020 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:15:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:08,271 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:15:08,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:08,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:08,271 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:15:08,271 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:15:08,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:15:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:15:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:08,857 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:08,857 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:08,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:08,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:08,857 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:08,857 INFO L423 AbstractCegarLoop]: === Iteration 437 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:08,858 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:08,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1910922690, now seen corresponding path program 421 times [2018-10-01 01:15:08,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:08,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:08,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:08,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:08,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:08,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:08,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:08,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:08,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:08,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:08,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:08,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:08,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:08,988 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:08,989 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:10,309 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:15:10,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:10,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:10,310 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:15:10,310 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:15:10,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:15:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2018-10-01 01:15:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:15:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:15:10,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:15:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:10,879 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:15:10,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:15:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:10,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:10,879 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:10,879 INFO L423 AbstractCegarLoop]: === Iteration 438 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:10,879 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1912767810, now seen corresponding path program 422 times [2018-10-01 01:15:10,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:10,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:10,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:10,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:10,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:10,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:10,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:10,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:15:10,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:15:10,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:10,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:11,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:11,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:11,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:11,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:11,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:11,006 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:15:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:12,273 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:15:12,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:12,273 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:12,273 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:15:12,274 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:15:12,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:15:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 01:15:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:12,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:12,854 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:12,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:12,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:12,855 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:15:12,855 INFO L423 AbstractCegarLoop]: === Iteration 439 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:12,855 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1912769732, now seen corresponding path program 423 times [2018-10-01 01:15:12,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:12,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:12,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:12,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:12,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:12,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:12,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:12,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:15:12,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:15:12,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:12,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:12,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:12,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:12,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:12,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:12,997 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:12,997 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:14,236 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:15:14,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:14,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:14,237 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:15:14,237 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:15:14,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:15:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2018-10-01 01:15:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:15:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:15:14,739 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:15:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:14,739 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:15:14,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:15:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:14,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:14,740 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:14,740 INFO L423 AbstractCegarLoop]: === Iteration 440 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:14,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash 815971776, now seen corresponding path program 424 times [2018-10-01 01:15:14,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:14,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:14,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:14,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:14,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:14,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:14,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:14,805 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:15:14,811 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:15:14,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:14,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:14,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:14,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:14,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:14,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:14,926 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:15:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:16,149 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:15:16,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:16,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:16,149 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:15:16,149 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:15:16,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:15:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:15:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:16,745 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:16,745 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:16,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:16,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:16,745 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:16,745 INFO L423 AbstractCegarLoop]: === Iteration 441 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:16,745 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:16,745 INFO L82 PathProgramCache]: Analyzing trace with hash 815973698, now seen corresponding path program 425 times [2018-10-01 01:15:16,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:16,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:16,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:16,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:16,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:16,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:16,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:16,810 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:15:16,819 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:15:16,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:16,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:16,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:16,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:16,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:16,877 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:16,877 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:18,108 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:15:18,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:18,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:18,109 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:15:18,109 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:15:18,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:15:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:15:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:15:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:15:18,698 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:15:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:18,698 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:15:18,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:15:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:18,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:18,699 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:18,699 INFO L423 AbstractCegarLoop]: === Iteration 442 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:18,699 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:18,699 INFO L82 PathProgramCache]: Analyzing trace with hash 817818818, now seen corresponding path program 426 times [2018-10-01 01:15:18,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:18,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:18,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:18,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:18,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:18,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:18,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:18,822 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:15:18,832 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:15:18,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:18,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:18,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:18,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:18,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:18,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:18,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:18,907 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:15:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:20,120 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:15:20,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:20,120 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:20,120 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:15:20,121 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:15:20,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:15:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:15:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:20,715 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:20,715 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:20,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:20,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:20,715 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:15:20,715 INFO L423 AbstractCegarLoop]: === Iteration 443 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:20,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash 817820740, now seen corresponding path program 427 times [2018-10-01 01:15:20,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:20,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:20,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:20,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:20,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:20,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:20,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:20,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:20,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:20,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:20,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:20,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:20,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:20,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:20,842 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:22,058 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:15:22,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:22,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:22,058 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:15:22,059 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:15:22,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:15:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 01:15:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:15:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:15:22,605 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:15:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:22,605 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:15:22,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:15:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:22,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:22,605 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:22,606 INFO L423 AbstractCegarLoop]: === Iteration 444 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:22,606 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1703988158, now seen corresponding path program 428 times [2018-10-01 01:15:22,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:22,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:22,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:22,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:22,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:22,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:22,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:22,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:15:22,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:15:22,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:22,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:22,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:22,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:22,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:22,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:22,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:22,734 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:15:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:23,863 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:15:23,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:23,863 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:23,863 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:15:23,863 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:15:23,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:15:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:15:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:24,480 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:24,480 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:24,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:24,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:24,481 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:15:24,481 INFO L423 AbstractCegarLoop]: === Iteration 445 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:24,481 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1703986236, now seen corresponding path program 429 times [2018-10-01 01:15:24,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:24,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:24,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:24,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:24,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:24,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:24,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:24,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:15:24,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:15:24,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:24,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:24,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:24,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:24,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:24,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:24,612 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:25,752 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:15:25,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:25,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:25,752 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:15:25,753 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:15:25,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:15:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:15:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:15:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:15:26,328 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:15:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:26,328 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:15:26,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:15:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:26,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:26,329 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:15:26,329 INFO L423 AbstractCegarLoop]: === Iteration 446 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:26,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1702141116, now seen corresponding path program 430 times [2018-10-01 01:15:26,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:26,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:26,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:26,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:26,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:26,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:26,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:26,392 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:15:26,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:15:26,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:26,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:26,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:26,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:26,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:26,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:26,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:26,467 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:15:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:27,588 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:15:27,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:27,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:27,588 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:15:27,589 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:15:27,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:15:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 01:15:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:28,178 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:28,179 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:28,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:28,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:28,179 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:15:28,179 INFO L423 AbstractCegarLoop]: === Iteration 447 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:28,179 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:28,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1702139194, now seen corresponding path program 431 times [2018-10-01 01:15:28,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:28,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:28,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:28,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:28,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:28,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:28,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:28,243 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:15:28,252 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:15:28,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:28,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:28,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:28,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:28,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:28,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:28,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:28,321 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:29,378 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:15:29,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:29,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:29,378 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:15:29,378 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:15:29,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:15:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 24. [2018-10-01 01:15:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:15:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 01:15:29,745 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-01 01:15:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:29,745 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 01:15:29,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 01:15:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:29,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:29,745 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:15:29,746 INFO L423 AbstractCegarLoop]: === Iteration 448 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:29,746 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1258208836, now seen corresponding path program 432 times [2018-10-01 01:15:29,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:29,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:29,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:29,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:29,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:29,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:29,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:29,921 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:15:29,929 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:15:29,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:29,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:29,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:29,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:29,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:29,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:29,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:29,986 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-01 01:15:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:31,311 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:15:31,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:31,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:31,312 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:15:31,312 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:15:31,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:15:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 01:15:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:31,949 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:31,949 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:31,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:31,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:31,950 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:31,950 INFO L423 AbstractCegarLoop]: === Iteration 449 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:31,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1258206914, now seen corresponding path program 433 times [2018-10-01 01:15:31,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:31,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:31,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:31,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:31,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:32,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:32,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:32,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:32,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:32,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:32,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:32,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:32,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:32,099 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:33,446 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:15:33,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:33,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:33,447 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:15:33,447 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:15:33,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:15:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 01:15:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:15:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:15:34,079 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:15:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:34,079 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:15:34,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:15:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:34,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:34,080 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:34,080 INFO L423 AbstractCegarLoop]: === Iteration 450 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:34,080 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:34,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1256361794, now seen corresponding path program 434 times [2018-10-01 01:15:34,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:34,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:34,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:34,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:34,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:34,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:34,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:34,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:15:34,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:15:34,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:34,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:34,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:34,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:34,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:34,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:34,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:34,242 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:15:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:35,580 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:15:35,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:35,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:35,581 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:15:35,581 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:15:35,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:15:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:15:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:36,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:36,231 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:36,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:36,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:36,231 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:36,231 INFO L423 AbstractCegarLoop]: === Iteration 451 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:36,231 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:36,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1256359872, now seen corresponding path program 435 times [2018-10-01 01:15:36,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:36,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:36,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:36,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:36,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:36,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:36,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:36,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:15:36,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:15:36,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:36,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:36,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:36,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:36,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:36,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:36,381 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:37,701 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:15:37,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:37,701 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:37,701 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:15:37,702 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:15:37,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:15:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 01:15:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:15:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:15:38,295 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:15:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:38,296 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:15:38,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:15:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:38,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:38,296 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:38,296 INFO L423 AbstractCegarLoop]: === Iteration 452 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:38,296 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash 516798526, now seen corresponding path program 436 times [2018-10-01 01:15:38,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:38,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:38,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:38,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:38,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:38,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:38,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:38,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:15:38,362 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:15:38,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:38,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:38,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:38,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:38,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:38,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:38,416 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:15:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:39,785 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:15:39,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:39,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:39,786 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:15:39,786 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:15:39,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:15:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 01:15:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:40,677 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:40,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:40,677 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:40,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:40,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:40,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:40,677 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:40,677 INFO L423 AbstractCegarLoop]: === Iteration 453 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:40,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:40,678 INFO L82 PathProgramCache]: Analyzing trace with hash 516800448, now seen corresponding path program 437 times [2018-10-01 01:15:40,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:40,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:40,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:40,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:40,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:40,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:40,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:40,739 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:15:40,749 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:15:40,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:40,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:40,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:40,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:40,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:40,812 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:40,812 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:42,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:42,177 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:15:42,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:42,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:42,177 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:15:42,178 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:15:42,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:15:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 01:15:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:15:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:15:42,807 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:15:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:42,807 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:15:42,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:15:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:42,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:42,808 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:42,808 INFO L423 AbstractCegarLoop]: === Iteration 454 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:42,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 518645568, now seen corresponding path program 438 times [2018-10-01 01:15:42,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:42,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:42,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:42,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:42,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:42,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:42,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:42,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:15:42,879 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:15:42,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:42,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:42,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:42,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:42,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:42,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:42,945 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:15:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:44,265 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:15:44,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:44,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:44,266 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:15:44,266 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:15:44,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:15:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:15:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:44,909 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:44,909 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:44,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:44,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:44,909 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:44,909 INFO L423 AbstractCegarLoop]: === Iteration 455 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:44,909 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash 518647490, now seen corresponding path program 439 times [2018-10-01 01:15:44,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:44,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:44,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:44,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:44,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:44,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:44,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:44,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:44,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:45,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:45,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:45,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:45,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:45,032 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:45,032 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:46,302 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:15:46,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:46,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:46,303 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:15:46,303 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:15:46,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:15:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-01 01:15:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:15:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:15:46,852 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:15:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:46,852 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:15:46,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:15:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:46,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:46,852 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:46,852 INFO L423 AbstractCegarLoop]: === Iteration 456 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:46,853 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash -578150466, now seen corresponding path program 440 times [2018-10-01 01:15:46,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:46,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:46,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:46,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:46,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:46,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:46,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:46,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:15:46,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:15:46,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:46,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:46,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:46,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:46,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:46,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:46,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:46,994 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:15:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:48,255 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:15:48,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:48,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:48,255 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:15:48,256 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:15:48,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:15:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 01:15:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:48,897 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:48,897 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:48,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:48,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:48,897 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:48,897 INFO L423 AbstractCegarLoop]: === Iteration 457 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:48,898 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash -578148544, now seen corresponding path program 441 times [2018-10-01 01:15:48,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:48,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:48,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:48,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:48,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:48,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:48,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:48,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:15:48,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:15:48,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:48,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:49,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:49,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:49,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:49,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:49,039 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:50,249 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:15:50,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:50,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:50,249 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:15:50,250 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:15:50,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:15:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:15:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:15:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:15:50,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:15:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:50,881 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:15:50,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:15:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:50,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:50,881 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:50,881 INFO L423 AbstractCegarLoop]: === Iteration 458 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:50,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:50,882 INFO L82 PathProgramCache]: Analyzing trace with hash -576303424, now seen corresponding path program 442 times [2018-10-01 01:15:50,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:50,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:50,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:50,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:50,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:50,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:50,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:50,950 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:15:50,955 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:15:50,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:50,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:51,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:51,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:51,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:51,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:51,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:51,002 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:15:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:52,256 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:15:52,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:52,256 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:52,256 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:15:52,257 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:15:52,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:15:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 01:15:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:52,898 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:52,898 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:52,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:52,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:52,898 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:52,898 INFO L423 AbstractCegarLoop]: === Iteration 459 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:52,898 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:52,899 INFO L82 PathProgramCache]: Analyzing trace with hash -576301502, now seen corresponding path program 443 times [2018-10-01 01:15:52,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:52,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:52,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:52,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:52,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:53,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:53,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:53,020 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:15:53,028 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:15:53,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:53,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:53,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:53,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:53,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:53,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:53,087 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:54,327 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:15:54,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:54,327 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:54,327 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:15:54,328 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:15:54,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:15:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:15:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-01 01:15:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:15:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:15:54,932 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:15:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:54,932 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:15:54,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:15:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:54,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:54,932 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:15:54,933 INFO L423 AbstractCegarLoop]: === Iteration 460 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:54,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:54,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1196856896, now seen corresponding path program 444 times [2018-10-01 01:15:54,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:54,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:54,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:54,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:54,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:54,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:54,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:55,001 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:15:55,009 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:15:55,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:55,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:55,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:55,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:55,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:55,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:55,073 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:55,073 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:15:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:56,241 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:15:56,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:56,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:56,242 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:15:56,242 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:15:56,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:15:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 01:15:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:15:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:15:56,888 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:15:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:56,888 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:15:56,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:15:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:56,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:56,888 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:56,888 INFO L423 AbstractCegarLoop]: === Iteration 461 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:56,889 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1196858818, now seen corresponding path program 445 times [2018-10-01 01:15:56,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:56,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:56,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:56,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:56,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:56,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:56,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:56,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:56,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:57,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:57,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:57,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:57,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:57,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:57,025 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:15:58,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:58,190 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:15:58,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:15:58,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:15:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:58,190 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:15:58,191 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:15:58,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:15:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:15:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:15:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:15:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:15:58,848 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:15:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:58,848 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:15:58,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:15:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:15:58,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:15:58,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:58,848 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:15:58,848 INFO L423 AbstractCegarLoop]: === Iteration 462 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:58,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:58,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1198703938, now seen corresponding path program 446 times [2018-10-01 01:15:58,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:58,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:58,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:58,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:58,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:58,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:58,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:58,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:15:58,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:15:58,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:58,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:58,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:58,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:15:58,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:15:58,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:15:58,983 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:58,983 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:16:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:00,124 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:16:00,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:00,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:00,124 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:16:00,125 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:16:00,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:16:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 01:16:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:00,769 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:00,769 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:00,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:00,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:00,770 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:16:00,770 INFO L423 AbstractCegarLoop]: === Iteration 463 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:00,770 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:00,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1198705860, now seen corresponding path program 447 times [2018-10-01 01:16:00,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:00,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:00,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:00,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:00,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:00,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:00,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:00,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:16:00,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:16:00,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:00,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:00,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:00,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:00,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:00,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:00,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:00,908 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:01,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:01,980 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:16:01,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:01,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:01,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:01,980 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:16:01,980 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:16:01,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:01,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:16:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-01 01:16:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:16:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:16:02,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:16:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:02,477 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:16:02,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:16:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:02,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:02,477 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:02,477 INFO L423 AbstractCegarLoop]: === Iteration 464 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:02,477 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:02,477 INFO L82 PathProgramCache]: Analyzing trace with hash -557144258, now seen corresponding path program 448 times [2018-10-01 01:16:02,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:02,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:02,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:02,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:02,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:02,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:02,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:02,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:16:02,546 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:16:02,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:02,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:02,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:02,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:02,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:02,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:02,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:02,600 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:16:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:03,979 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:16:03,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:03,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:03,979 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:16:03,980 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:16:03,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:16:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 01:16:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:04,626 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:04,626 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:04,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:04,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:04,627 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:16:04,627 INFO L423 AbstractCegarLoop]: === Iteration 465 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:04,627 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash -557142336, now seen corresponding path program 449 times [2018-10-01 01:16:04,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:04,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:04,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:04,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:04,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:04,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:04,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:04,694 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:16:04,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:16:04,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:04,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:04,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:04,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:04,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:04,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:04,773 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:06,197 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:16:06,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:06,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:06,198 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:16:06,198 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:16:06,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:16:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:16:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 01:16:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:16:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:16:06,831 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:16:06,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:06,831 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:16:06,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:16:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:06,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:06,831 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:16:06,831 INFO L423 AbstractCegarLoop]: === Iteration 466 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:06,831 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:06,832 INFO L82 PathProgramCache]: Analyzing trace with hash -555297216, now seen corresponding path program 450 times [2018-10-01 01:16:06,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:06,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:06,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:06,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:06,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:06,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:06,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:06,893 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:16:06,902 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:16:06,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:06,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:06,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:06,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:06,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:06,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:06,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:06,969 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:16:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:08,325 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:16:08,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:08,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:08,325 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:16:08,325 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:16:08,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:16:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:16:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:08,974 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:08,974 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:08,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:08,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:08,975 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:08,975 INFO L423 AbstractCegarLoop]: === Iteration 467 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:08,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash -555295294, now seen corresponding path program 451 times [2018-10-01 01:16:08,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:08,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:08,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:08,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:08,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:09,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:09,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:09,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:09,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:09,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:09,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:09,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:09,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:09,104 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:10,387 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:16:10,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:10,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:10,388 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:16:10,388 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:16:10,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:16:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 01:16:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:16:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:16:11,005 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:16:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:11,005 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:16:11,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:16:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:11,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:11,005 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:16:11,005 INFO L423 AbstractCegarLoop]: === Iteration 468 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:11,005 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1217863104, now seen corresponding path program 452 times [2018-10-01 01:16:11,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:11,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:11,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:11,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:11,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:11,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:11,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:11,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:16:11,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:16:11,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:11,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:11,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:11,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:11,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:11,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:11,132 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:11,132 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:16:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:12,516 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:16:12,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:12,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:12,516 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:16:12,517 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:16:12,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:16:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 01:16:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:13,167 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:13,167 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:13,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:13,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:13,167 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:13,167 INFO L423 AbstractCegarLoop]: === Iteration 469 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:13,167 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:13,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1217865026, now seen corresponding path program 453 times [2018-10-01 01:16:13,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:13,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:13,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:13,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:13,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:13,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:13,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:13,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:16:13,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:16:13,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:13,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:13,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:13,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:13,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:13,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:13,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:13,294 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:14,672 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:16:14,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:14,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:14,672 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:16:14,672 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:16:14,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:16:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 01:16:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:16:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:16:15,321 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:16:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:15,321 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:16:15,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:16:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:15,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:15,322 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:15,322 INFO L423 AbstractCegarLoop]: === Iteration 470 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:15,322 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:15,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1219710146, now seen corresponding path program 454 times [2018-10-01 01:16:15,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:15,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:15,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:15,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:15,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:15,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:15,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:15,412 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:16:15,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:16:15,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:15,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:15,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:15,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:15,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:15,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:15,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:15,471 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:16:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:16,809 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:16:16,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:16,809 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:16,809 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:16:16,810 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:16:16,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:16:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:16:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:16:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:17,461 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:17,462 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:17,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:17,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:17,462 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:16:17,462 INFO L423 AbstractCegarLoop]: === Iteration 471 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:17,462 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1219712068, now seen corresponding path program 455 times [2018-10-01 01:16:17,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:17,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:17,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:17,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:17,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:17,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:17,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:17,524 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:16:17,533 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:16:17,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:17,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:17,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:17,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:17,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:17,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:17,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:17,590 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:18,894 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:16:18,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:18,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:18,894 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:16:18,895 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:16:18,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:16:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-01 01:16:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:16:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:16:19,455 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:16:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:19,456 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:16:19,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:16:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:19,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:19,456 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:16:19,456 INFO L423 AbstractCegarLoop]: === Iteration 472 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:19,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:19,456 INFO L82 PathProgramCache]: Analyzing trace with hash 122914112, now seen corresponding path program 456 times [2018-10-01 01:16:19,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:19,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:19,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:19,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:19,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:19,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:19,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:19,518 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:16:19,526 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:16:19,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:19,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:19,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:19,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:19,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:19,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:19,581 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:19,581 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:16:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:20,872 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:16:20,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:20,872 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:20,873 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:16:20,873 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:16:20,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:16:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 01:16:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:21,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:21,528 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:21,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:21,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:21,528 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:21,528 INFO L423 AbstractCegarLoop]: === Iteration 473 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:21,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash 122916034, now seen corresponding path program 457 times [2018-10-01 01:16:21,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:21,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:21,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:21,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:21,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:21,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:21,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:21,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:21,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:21,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:21,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:21,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:21,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:21,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:21,651 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:22,915 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:16:22,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:22,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:22,916 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:16:22,916 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:16:22,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:16:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 01:16:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:16:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:16:23,557 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:16:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:23,557 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:16:23,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:16:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:23,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:23,557 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:23,558 INFO L423 AbstractCegarLoop]: === Iteration 474 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:23,558 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:23,558 INFO L82 PathProgramCache]: Analyzing trace with hash 124761154, now seen corresponding path program 458 times [2018-10-01 01:16:23,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:23,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:23,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:23,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:23,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:23,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:23,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:23,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:16:23,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:16:23,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:23,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:23,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:23,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:23,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:23,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:23,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:23,682 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:16:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:24,972 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:16:24,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:24,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:24,972 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:16:24,973 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:16:24,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:16:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 01:16:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:25,635 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:25,636 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:25,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:25,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:25,636 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:16:25,636 INFO L423 AbstractCegarLoop]: === Iteration 475 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:25,636 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash 124763076, now seen corresponding path program 459 times [2018-10-01 01:16:25,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:25,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:25,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:25,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:25,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:25,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:25,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:25,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:16:25,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:16:25,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:25,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:25,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:25,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:25,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:25,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:25,772 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:27,048 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:16:27,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:27,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:27,048 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:16:27,048 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:16:27,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:16:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-01 01:16:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:16:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:16:27,657 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:16:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:27,657 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:16:27,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:16:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:27,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:27,658 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:27,658 INFO L423 AbstractCegarLoop]: === Iteration 476 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:27,658 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:27,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1897921474, now seen corresponding path program 460 times [2018-10-01 01:16:27,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:27,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:27,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:27,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:27,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:27,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:27,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:27,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:16:27,731 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:16:27,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:27,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:27,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:27,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:27,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:27,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:27,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:27,798 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:16:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:29,009 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:16:29,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:29,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:29,009 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:16:29,010 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:16:29,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:16:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 01:16:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:29,671 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:29,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:29,671 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:29,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:29,671 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:29,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:29,671 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:16:29,671 INFO L423 AbstractCegarLoop]: === Iteration 477 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:29,671 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:29,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1897923396, now seen corresponding path program 461 times [2018-10-01 01:16:29,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:29,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:29,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:29,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:29,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:29,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:29,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:29,731 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:16:29,741 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:16:29,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:29,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:29,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:29,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:29,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:29,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:29,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:29,808 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:31,022 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:16:31,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:31,022 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:31,023 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:16:31,023 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:16:31,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:16:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:16:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:16:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:16:31,666 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:16:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:31,666 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:16:31,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:16:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:31,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:31,666 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:16:31,666 INFO L423 AbstractCegarLoop]: === Iteration 478 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:31,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:31,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1899768516, now seen corresponding path program 462 times [2018-10-01 01:16:31,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:31,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:31,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:31,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:31,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:31,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:31,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:31,729 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:16:31,738 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:16:31,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:31,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:31,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:31,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:31,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:31,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:31,794 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:16:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:32,990 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:16:32,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:32,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:32,990 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:16:32,991 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:16:32,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:16:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 01:16:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:33,650 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:33,650 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:33,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:33,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:33,651 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:16:33,651 INFO L423 AbstractCegarLoop]: === Iteration 479 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:33,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:33,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1899770438, now seen corresponding path program 463 times [2018-10-01 01:16:33,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:33,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:33,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:33,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:33,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:33,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:33,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:33,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:33,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:33,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:33,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:33,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:33,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:33,787 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:34,902 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:16:34,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:34,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:34,903 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:16:34,903 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:16:34,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:16:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 26. [2018-10-01 01:16:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:16:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:16:35,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 01:16:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:35,358 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:16:35,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:16:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:35,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:35,358 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:35,358 INFO L423 AbstractCegarLoop]: === Iteration 480 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:35,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:35,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1845014850, now seen corresponding path program 464 times [2018-10-01 01:16:35,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:35,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:35,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:35,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:35,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:35,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:35,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:35,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:16:35,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:16:35,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:35,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:35,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:35,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:35,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:35,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:35,507 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 01:16:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:36,779 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:16:36,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:36,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:36,779 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:16:36,780 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:16:36,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:16:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:16:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:16:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:37,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:37,466 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:37,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:37,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:37,466 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:16:37,466 INFO L423 AbstractCegarLoop]: === Iteration 481 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:37,466 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:37,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1845012928, now seen corresponding path program 465 times [2018-10-01 01:16:37,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:37,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:37,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:37,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:37,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:37,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:37,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:37,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:16:37,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:16:37,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:37,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:37,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:37,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:37,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:37,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:37,593 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:38,872 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:16:38,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:38,872 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:38,872 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:16:38,873 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:16:38,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:16:39,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:16:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:16:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:16:39,540 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:16:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:39,540 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:16:39,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:16:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:39,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:39,541 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:16:39,541 INFO L423 AbstractCegarLoop]: === Iteration 482 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:39,541 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1843167808, now seen corresponding path program 466 times [2018-10-01 01:16:39,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:39,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:39,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:39,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:39,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:39,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:39,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:39,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:16:39,614 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:16:39,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:39,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:39,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:39,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:39,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:39,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:39,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:39,681 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:16:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:40,980 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:16:40,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:40,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:40,980 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:16:40,981 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:16:40,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:16:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:16:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:16:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:41,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:41,665 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:41,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:41,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:41,665 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:41,666 INFO L423 AbstractCegarLoop]: === Iteration 483 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:41,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:41,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1843165886, now seen corresponding path program 467 times [2018-10-01 01:16:41,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:41,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:41,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:41,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:41,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:41,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:41,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:41,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:16:41,740 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:16:41,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:41,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:41,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:41,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:41,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:41,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:41,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:41,797 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:43,034 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:16:43,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:43,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:43,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:43,034 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:16:43,035 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:16:43,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:16:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:16:43,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:16:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:16:43,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:16:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:43,680 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:16:43,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:16:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:43,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:43,680 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:16:43,681 INFO L423 AbstractCegarLoop]: === Iteration 484 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:43,681 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash -70007488, now seen corresponding path program 468 times [2018-10-01 01:16:43,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:43,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:43,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:43,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:43,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:43,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:43,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:43,744 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:16:43,753 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:16:43,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:43,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:43,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:43,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:43,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:43,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:43,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:43,809 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:16:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:45,100 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:16:45,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:45,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:45,100 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:16:45,101 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:16:45,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:16:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 01:16:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:45,795 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:45,795 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:45,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:45,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:45,795 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:45,795 INFO L423 AbstractCegarLoop]: === Iteration 485 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:45,795 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:45,795 INFO L82 PathProgramCache]: Analyzing trace with hash -70005566, now seen corresponding path program 469 times [2018-10-01 01:16:45,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:45,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:45,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:45,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:45,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:45,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:45,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:45,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:45,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:45,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:45,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:45,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:45,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:45,931 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:47,190 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:16:47,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:47,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:47,190 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:16:47,190 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:16:47,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:16:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 01:16:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:16:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:16:47,899 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:16:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:47,899 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:16:47,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:16:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:47,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:47,899 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:47,899 INFO L423 AbstractCegarLoop]: === Iteration 486 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:47,899 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -68160446, now seen corresponding path program 470 times [2018-10-01 01:16:47,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:47,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:47,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:47,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:47,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:47,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:47,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:47,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:16:47,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:16:47,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:47,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:48,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:48,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:48,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:48,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:48,026 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:16:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:49,141 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:16:49,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:49,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:49,141 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:16:49,142 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:16:49,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:16:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2018-10-01 01:16:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:49,829 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:49,829 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:49,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:49,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:49,830 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:16:49,830 INFO L423 AbstractCegarLoop]: === Iteration 487 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:49,830 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash -68158524, now seen corresponding path program 471 times [2018-10-01 01:16:49,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:49,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:49,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:49,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:49,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:49,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:49,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:49,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:16:49,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:16:49,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:49,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:49,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:49,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:49,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:49,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:49,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:49,954 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:51,050 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:16:51,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:51,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:51,051 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:16:51,051 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:16:51,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:16:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-01 01:16:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:16:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:16:51,651 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:16:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:51,651 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:16:51,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:16:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:51,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:51,651 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:16:51,651 INFO L423 AbstractCegarLoop]: === Iteration 488 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:51,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1164956480, now seen corresponding path program 472 times [2018-10-01 01:16:51,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:51,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:51,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:51,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:51,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:51,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:51,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:51,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:16:51,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:16:51,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:51,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:51,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:51,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:51,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:51,774 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:51,774 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:16:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:53,055 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:16:53,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:53,055 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:53,055 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:16:53,056 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:16:53,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:16:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:16:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:53,744 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:53,744 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:53,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:53,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:53,744 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:53,744 INFO L423 AbstractCegarLoop]: === Iteration 489 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:53,744 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:53,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1164954558, now seen corresponding path program 473 times [2018-10-01 01:16:53,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:53,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:53,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:53,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:53,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:53,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:53,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:53,805 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:16:53,813 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:16:53,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:53,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:53,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:53,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:53,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:53,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:53,881 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:55,148 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:16:55,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:55,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:55,148 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:16:55,149 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:16:55,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:16:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 01:16:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:16:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:16:55,837 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:16:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:55,837 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:16:55,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:16:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:55,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:55,838 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:55,838 INFO L423 AbstractCegarLoop]: === Iteration 490 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:55,838 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1163109438, now seen corresponding path program 474 times [2018-10-01 01:16:55,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:55,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:55,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:55,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:55,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:55,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:55,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:55,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:16:55,914 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:16:55,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:55,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:55,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:55,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:55,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:55,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:55,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:55,985 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:16:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:57,277 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:16:57,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:57,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:57,277 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:16:57,278 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:16:57,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:57,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:16:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:16:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:16:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:16:57,963 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:16:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:57,963 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:16:57,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:16:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:57,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:57,964 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:16:57,964 INFO L423 AbstractCegarLoop]: === Iteration 491 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:57,964 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1163107516, now seen corresponding path program 475 times [2018-10-01 01:16:57,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:57,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:57,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:57,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:57,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:58,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:58,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:58,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:58,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:58,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:58,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:16:58,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:16:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:16:58,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:58,084 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:16:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:59,358 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:16:59,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:16:59,358 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:16:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:59,358 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:16:59,359 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:16:59,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:16:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:16:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 01:16:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:16:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:16:59,998 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:16:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:59,998 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:16:59,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:16:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:16:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:16:59,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:59,999 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:16:59,999 INFO L423 AbstractCegarLoop]: === Iteration 492 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:59,999 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash 610050882, now seen corresponding path program 476 times [2018-10-01 01:16:59,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:59,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:00,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:00,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:00,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:00,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:00,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:00,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:00,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:00,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:00,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:00,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:00,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:00,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:00,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:00,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:00,140 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:17:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:01,314 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:17:01,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:01,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:01,315 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:17:01,315 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:17:01,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:17:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 01:17:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:02,003 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:02,003 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:02,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:02,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:02,003 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:17:02,003 INFO L423 AbstractCegarLoop]: === Iteration 493 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:02,003 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 610052804, now seen corresponding path program 477 times [2018-10-01 01:17:02,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:02,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:02,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:02,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:02,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:02,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:02,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:02,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:17:02,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:17:02,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:02,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:02,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:02,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:02,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:02,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:02,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:02,133 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:03,330 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:17:03,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:03,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:03,330 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:17:03,331 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:17:03,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:17:04,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 01:17:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:17:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:17:04,012 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:17:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:04,012 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:17:04,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:17:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:04,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:04,013 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:17:04,013 INFO L423 AbstractCegarLoop]: === Iteration 494 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:04,013 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash 611897924, now seen corresponding path program 478 times [2018-10-01 01:17:04,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:04,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:04,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:04,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:04,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:04,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:04,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:04,075 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:17:04,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:17:04,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:04,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:04,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:04,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:04,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:04,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:04,149 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:17:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:05,306 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:17:05,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:05,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:05,306 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:17:05,307 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:17:05,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:17:05,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2018-10-01 01:17:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:05,994 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:05,994 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:05,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:05,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:05,995 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:17:05,995 INFO L423 AbstractCegarLoop]: === Iteration 495 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:05,995 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash 611899846, now seen corresponding path program 479 times [2018-10-01 01:17:05,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:05,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:05,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:05,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:05,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:06,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:06,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:06,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:17:06,169 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:17:06,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:06,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:06,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:06,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:06,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:06,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:06,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:06,289 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:07,422 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:17:07,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:07,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:07,423 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:17:07,423 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:17:07,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:17:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:17:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 01:17:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:17:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:17:07,958 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 01:17:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:07,958 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:17:07,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:17:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:07,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:07,958 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 01:17:07,958 INFO L423 AbstractCegarLoop]: === Iteration 496 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:07,958 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:07,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1143950272, now seen corresponding path program 480 times [2018-10-01 01:17:07,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:07,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:07,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:07,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:07,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:08,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:08,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:08,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:17:08,030 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:17:08,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:08,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:08,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:08,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:08,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:08,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:08,084 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 01:17:09,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:09,234 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:17:09,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:09,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:09,234 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:17:09,235 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:17:09,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:17:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2018-10-01 01:17:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:09,934 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:09,934 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:09,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:09,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:09,934 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:17:09,935 INFO L423 AbstractCegarLoop]: === Iteration 497 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:09,935 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:09,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1143948350, now seen corresponding path program 481 times [2018-10-01 01:17:09,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:09,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:09,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:09,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:09,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:09,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:09,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:10,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:10,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:10,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:10,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:10,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:10,063 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:10,063 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:11,243 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:17:11,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:11,243 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:11,243 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:17:11,244 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:17:11,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:17:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:17:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:17:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:17:11,936 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:17:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:11,936 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:17:11,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:17:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:11,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:11,936 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:17:11,937 INFO L423 AbstractCegarLoop]: === Iteration 498 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:11,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:11,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1142103230, now seen corresponding path program 482 times [2018-10-01 01:17:11,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:11,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:11,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:11,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:11,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:11,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:11,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:11,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:12,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:12,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:12,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:12,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:12,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:12,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:12,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:12,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:12,057 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:17:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:13,164 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:17:13,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:13,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:13,164 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:17:13,165 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:17:13,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:17:13,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2018-10-01 01:17:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:13,868 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:13,868 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:13,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:13,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:13,869 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:17:13,869 INFO L423 AbstractCegarLoop]: === Iteration 499 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:13,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1142101308, now seen corresponding path program 483 times [2018-10-01 01:17:13,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:13,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:13,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:13,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:13,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:13,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:13,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:13,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:17:13,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:17:13,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:13,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:13,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:14,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:14,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:14,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:14,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:14,000 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:15,059 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:17:15,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:15,059 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:15,060 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:17:15,060 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:17:15,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:17:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-01 01:17:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:17:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:17:15,711 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:17:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:15,711 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:17:15,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:17:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:15,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:15,712 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:17:15,712 INFO L423 AbstractCegarLoop]: === Iteration 500 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:15,712 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:15,712 INFO L82 PathProgramCache]: Analyzing trace with hash 631057090, now seen corresponding path program 484 times [2018-10-01 01:17:15,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:15,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:15,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:15,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:15,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:15,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:15,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:15,773 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:17:15,778 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:17:15,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:15,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:15,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:15,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:15,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:15,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:15,833 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:17:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:16,979 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:17:16,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:16,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:16,980 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:17:16,980 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:17:16,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:16,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:17:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2018-10-01 01:17:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:17,683 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:17,683 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:17,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:17,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:17,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:17,684 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:17:17,684 INFO L423 AbstractCegarLoop]: === Iteration 501 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:17,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash 631059012, now seen corresponding path program 485 times [2018-10-01 01:17:17,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:17,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:17,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:17,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:17,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:17,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:17,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:17,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:17:17,759 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:17:17,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:17,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:17,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:17,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:17,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:17,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:17,814 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:18,938 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 01:17:18,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:18,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:18,938 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:17:18,939 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:17:18,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:17:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 01:17:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:17:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:17:19,644 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:17:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:19,644 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:17:19,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:17:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:19,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:19,644 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:17:19,644 INFO L423 AbstractCegarLoop]: === Iteration 502 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:19,644 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 632904132, now seen corresponding path program 486 times [2018-10-01 01:17:19,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:19,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:19,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:19,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:19,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:19,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:19,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:19,704 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:17:19,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:17:19,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:19,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:19,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:19,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:19,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:19,770 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:19,770 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:17:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:20,894 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 01:17:20,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:20,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:20,894 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:17:20,895 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:17:20,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:17:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2018-10-01 01:17:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:21,601 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:21,601 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:21,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:21,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:21,602 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:17:21,602 INFO L423 AbstractCegarLoop]: === Iteration 503 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:21,602 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash 632906054, now seen corresponding path program 487 times [2018-10-01 01:17:21,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:21,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:21,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:21,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:21,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:21,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:21,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:21,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:21,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:21,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:21,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:21,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:21,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:21,740 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:22,820 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:17:22,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:22,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:22,821 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:17:22,821 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:17:22,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:17:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-01 01:17:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:17:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:17:23,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 01:17:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:23,422 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:17:23,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:17:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:23,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:23,422 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 01:17:23,423 INFO L423 AbstractCegarLoop]: === Iteration 504 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:23,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:23,423 INFO L82 PathProgramCache]: Analyzing trace with hash -463891902, now seen corresponding path program 488 times [2018-10-01 01:17:23,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:23,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:23,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:23,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:23,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:23,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:23,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:23,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:23,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:23,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:23,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:23,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:23,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:23,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:23,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:23,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:23,560 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 01:17:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:24,629 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:17:24,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:24,629 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:24,629 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:17:24,629 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:17:24,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:17:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-10-01 01:17:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:25,336 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:25,337 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:25,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:25,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:25,337 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:17:25,337 INFO L423 AbstractCegarLoop]: === Iteration 505 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:25,337 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash -463889980, now seen corresponding path program 489 times [2018-10-01 01:17:25,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:25,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:25,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:25,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:25,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:25,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:25,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:25,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:17:25,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:17:25,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:25,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:25,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:25,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:25,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:25,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:25,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:25,480 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:26,541 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:17:26,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:26,541 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:26,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:26,542 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:17:26,542 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:17:26,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:26,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:17:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-01 01:17:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:17:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:17:27,236 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:17:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:27,236 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:17:27,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:17:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:27,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:27,236 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:17:27,236 INFO L423 AbstractCegarLoop]: === Iteration 506 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:27,236 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash -462044860, now seen corresponding path program 490 times [2018-10-01 01:17:27,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:27,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:27,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:27,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:27,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:27,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:27,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:27,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:17:27,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:17:27,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:27,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:27,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:27,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:27,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:27,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:27,370 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:17:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:28,446 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 01:17:28,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:28,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:28,446 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:17:28,447 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:17:28,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:17:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-10-01 01:17:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:29,151 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:29,151 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:29,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:29,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:29,151 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:17:29,151 INFO L423 AbstractCegarLoop]: === Iteration 507 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:29,152 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash -462042938, now seen corresponding path program 491 times [2018-10-01 01:17:29,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:29,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:29,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:29,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:29,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:29,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:29,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:29,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:17:29,223 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:17:29,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:29,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:29,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:29,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:29,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:29,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:29,287 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:30,291 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 01:17:30,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:30,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:30,291 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:17:30,292 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:17:30,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:17:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-01 01:17:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:17:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:17:30,960 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 01:17:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:30,960 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:17:30,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:17:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:30,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:30,960 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 01:17:30,961 INFO L423 AbstractCegarLoop]: === Iteration 508 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:30,961 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:30,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1311115460, now seen corresponding path program 492 times [2018-10-01 01:17:30,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:30,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:30,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:30,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:30,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:31,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:31,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:31,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:17:31,036 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:17:31,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:31,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:31,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:31,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:31,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:31,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:31,105 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:31,105 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 01:17:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:32,072 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:17:32,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:32,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:32,072 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:17:32,072 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:17:32,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:17:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2018-10-01 01:17:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:32,791 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:32,791 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:32,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:32,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:32,792 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:17:32,792 INFO L423 AbstractCegarLoop]: === Iteration 509 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:32,792 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1311117382, now seen corresponding path program 493 times [2018-10-01 01:17:32,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:32,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:32,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:32,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:32,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:32,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:32,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:32,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:32,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:32,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:32,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:32,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:32,921 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:32,921 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:33,922 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 01:17:33,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:33,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:33,923 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:17:33,923 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:17:33,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:17:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-10-01 01:17:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:17:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:17:34,615 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 01:17:34,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:34,615 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:17:34,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:17:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:34,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:34,616 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 01:17:34,616 INFO L423 AbstractCegarLoop]: === Iteration 510 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:34,616 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1312962502, now seen corresponding path program 494 times [2018-10-01 01:17:34,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:34,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:34,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:34,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:34,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:34,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:34,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:34,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:34,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:34,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:34,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:34,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:34,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:34,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:34,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:34,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:34,739 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 01:17:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:35,706 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 01:17:35,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:35,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:35,707 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:17:35,707 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:17:35,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:17:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2018-10-01 01:17:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:36,452 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 01:17:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:36,452 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:36,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:17:36,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:36,452 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-10-01 01:17:36,452 INFO L423 AbstractCegarLoop]: === Iteration 511 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:36,453 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1312964424, now seen corresponding path program 8 times [2018-10-01 01:17:36,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:36,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:36,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:36,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:36,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:36,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:36,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:36,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:36,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:36,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:36,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:36,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:36,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:17:36,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:17:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:17:36,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:36,578 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 01:17:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:37,473 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2018-10-01 01:17:37,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:17:37,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 01:17:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:37,473 INFO L225 Difference]: With dead ends: 40 [2018-10-01 01:17:37,473 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 01:17:37,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 01:17:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2018-10-01 01:17:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:17:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 01:17:37,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-01 01:17:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:37,899 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 01:17:37,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:17:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 01:17:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:17:37,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:37,899 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1] [2018-10-01 01:17:37,899 INFO L423 AbstractCegarLoop]: === Iteration 512 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:37,900 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:37,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1024105275, now seen corresponding path program 9 times [2018-10-01 01:17:37,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:37,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:37,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:37,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:37,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:37,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:37,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:38,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:17:38,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:17:38,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:38,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:38,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:38,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:17:38,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:17:38,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:17:38,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:38,151 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 12 states. [2018-10-01 01:17:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:40,059 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 01:17:40,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:17:40,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:17:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:40,060 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:17:40,060 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:17:40,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:17:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:17:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 01:17:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:17:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:17:40,896 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:17:40,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:40,896 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:17:40,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:17:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:17:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:17:40,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:40,897 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 01:17:40,897 INFO L423 AbstractCegarLoop]: === Iteration 513 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:40,897 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1024107197, now seen corresponding path program 495 times [2018-10-01 01:17:40,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:40,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:40,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:40,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:40,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:40,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:40,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:40,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:17:40,977 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:17:40,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:40,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:41,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:41,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:17:41,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:17:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:17:41,032 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:41,032 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:17:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:42,933 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:17:42,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:17:42,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:17:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:42,934 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:17:42,934 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:17:42,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:17:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:17:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:43,767 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:17:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:43,768 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:43,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:17:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:17:43,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:43,768 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 01:17:43,768 INFO L423 AbstractCegarLoop]: === Iteration 514 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:43,768 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:43,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1025952317, now seen corresponding path program 496 times [2018-10-01 01:17:43,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:43,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:43,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:43,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:43,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:43,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:43,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:43,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:17:43,847 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:17:43,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:43,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:43,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:43,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:17:43,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:17:43,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:17:43,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:43,919 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:17:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:45,878 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 01:17:45,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:17:45,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:17:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:45,879 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:17:45,879 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:17:45,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:17:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:17:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 01:17:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:17:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:17:46,730 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:17:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:46,730 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:17:46,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:17:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:17:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:17:46,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:46,731 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:17:46,731 INFO L423 AbstractCegarLoop]: === Iteration 515 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:46,731 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1025954239, now seen corresponding path program 497 times [2018-10-01 01:17:46,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:46,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:46,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:46,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:46,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:46,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:46,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:46,797 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:17:46,808 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:17:46,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:46,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:46,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:46,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:17:46,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:17:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:17:46,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:46,867 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:17:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:48,793 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:17:48,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:17:48,793 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:17:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:48,794 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:17:48,794 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:17:48,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:17:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2018-10-01 01:17:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:17:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:17:49,588 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:17:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:49,588 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:17:49,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:17:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:17:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:17:49,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:49,588 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 01:17:49,588 INFO L423 AbstractCegarLoop]: === Iteration 516 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:49,588 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:49,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1495854659, now seen corresponding path program 498 times [2018-10-01 01:17:49,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:49,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:49,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:49,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:49,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:49,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:49,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:49,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:17:49,671 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:17:49,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:49,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:49,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:49,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:17:49,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:17:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:17:49,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:49,730 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:17:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:51,553 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:17:51,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:17:51,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:17:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:51,554 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:17:51,554 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:17:51,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:17:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2018-10-01 01:17:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:17:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:17:52,489 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:17:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:52,489 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:17:52,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:17:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:17:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:17:52,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:52,489 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:17:52,489 INFO L423 AbstractCegarLoop]: === Iteration 517 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:52,489 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:52,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1495852737, now seen corresponding path program 499 times [2018-10-01 01:17:52,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:52,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:52,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:52,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:52,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:52,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:52,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:52,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:52,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:52,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:52,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:17:52,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:17:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:17:52,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:52,656 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:17:54,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:54,555 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:17:54,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:17:54,555 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:17:54,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:54,556 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:17:54,556 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:17:54,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:17:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:17:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2018-10-01 01:17:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:17:55,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:17:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:55,391 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:17:55,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:17:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:17:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:17:55,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:55,391 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:17:55,391 INFO L423 AbstractCegarLoop]: === Iteration 518 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:55,391 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:55,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1494007617, now seen corresponding path program 500 times [2018-10-01 01:17:55,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:55,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:55,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:55,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:55,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:55,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:55,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:55,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:55,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:55,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:55,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:55,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:55,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:17:55,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:17:55,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:17:55,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:55,533 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:17:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:57,302 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:17:57,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:17:57,302 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:17:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:57,303 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:17:57,303 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:17:57,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:17:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:17:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 01:17:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:17:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:17:58,186 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:17:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:58,187 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:17:58,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:17:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:17:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:17:58,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:58,187 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:17:58,187 INFO L423 AbstractCegarLoop]: === Iteration 519 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:58,187 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1494005695, now seen corresponding path program 501 times [2018-10-01 01:17:58,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:58,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:58,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:58,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:58,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:58,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:58,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:58,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:17:58,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:17:58,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:58,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:58,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:58,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:17:58,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:17:58,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:17:58,328 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:58,328 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:00,130 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:18:00,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:00,130 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:00,130 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:18:00,131 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:18:00,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:18:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 32. [2018-10-01 01:18:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:18:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:18:00,882 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 01:18:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:00,882 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:18:00,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:18:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:00,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:00,882 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 01:18:00,882 INFO L423 AbstractCegarLoop]: === Iteration 520 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:00,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1704163645, now seen corresponding path program 502 times [2018-10-01 01:18:00,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:00,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:00,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:00,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:00,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:00,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:00,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:00,949 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:18:00,955 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:18:00,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:00,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:01,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:01,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:01,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:01,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:01,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:01,025 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 01:18:03,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:03,017 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 01:18:03,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:03,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:03,018 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:18:03,018 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:18:03,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:18:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:18:03,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 01:18:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:03,878 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:03,878 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:03,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:03,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:03,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:03,878 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:18:03,878 INFO L423 AbstractCegarLoop]: === Iteration 521 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:03,879 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:03,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1704165567, now seen corresponding path program 503 times [2018-10-01 01:18:03,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:03,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:03,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:03,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:03,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:03,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:03,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:03,946 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:18:03,957 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:18:03,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:03,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:04,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:04,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:04,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:04,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:04,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:04,016 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:05,937 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:18:05,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:05,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:05,938 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:18:05,938 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:18:05,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:18:06,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:18:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:18:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:18:06,778 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:18:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:06,778 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:18:06,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:18:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:06,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:06,778 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:18:06,778 INFO L423 AbstractCegarLoop]: === Iteration 522 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:06,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1706010687, now seen corresponding path program 504 times [2018-10-01 01:18:06,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:06,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:06,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:06,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:06,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:06,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:06,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:06,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:18:06,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:18:06,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:06,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:06,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:06,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:06,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:06,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:06,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:06,920 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:18:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:08,885 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 01:18:08,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:08,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:08,886 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:18:08,886 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:18:08,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:18:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 01:18:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:09,739 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:09,739 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:09,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:09,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:09,739 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:09,739 INFO L423 AbstractCegarLoop]: === Iteration 523 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:09,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1706012609, now seen corresponding path program 505 times [2018-10-01 01:18:09,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:09,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:09,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:09,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:09,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:09,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:09,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:09,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:09,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:09,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:09,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:09,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:09,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:09,882 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:11,858 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:18:11,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:11,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:11,859 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:18:11,859 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:18:11,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:18:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2018-10-01 01:18:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:18:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:18:12,658 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:18:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:12,659 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:18:12,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:18:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:12,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:12,659 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:18:12,659 INFO L423 AbstractCegarLoop]: === Iteration 524 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:12,659 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash -815796289, now seen corresponding path program 506 times [2018-10-01 01:18:12,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:12,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:12,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:12,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:12,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:12,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:12,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:12,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:18:12,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:18:12,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:12,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:12,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:12,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:12,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:12,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:12,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:12,802 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:18:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:14,694 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:18:14,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:14,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:14,695 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:18:14,695 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:18:14,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:18:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2018-10-01 01:18:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:15,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:15,547 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:15,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:15,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:15,547 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:15,547 INFO L423 AbstractCegarLoop]: === Iteration 525 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:15,547 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -815794367, now seen corresponding path program 507 times [2018-10-01 01:18:15,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:15,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:15,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:15,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:15,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:15,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:15,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:15,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:18:15,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:18:15,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:15,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:15,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:15,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:15,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:15,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:15,691 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:17,534 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:18:17,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:17,534 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:17,534 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:18:17,535 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:18:17,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:18:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2018-10-01 01:18:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:18:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:18:18,376 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:18:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:18,377 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:18:18,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:18:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:18,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:18,377 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:18,377 INFO L423 AbstractCegarLoop]: === Iteration 526 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:18,377 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash -813949247, now seen corresponding path program 508 times [2018-10-01 01:18:18,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:18,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:18,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:18,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:18,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:18,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:18:18,452 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:18:18,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:18,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:18,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:18,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:18,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:18,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:18,508 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:18:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:20,336 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:18:20,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:20,336 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:20,337 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:18:20,337 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:18:20,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:18:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 01:18:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:21,196 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:21,196 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:21,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:21,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:21,197 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:18:21,197 INFO L423 AbstractCegarLoop]: === Iteration 527 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:21,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash -813947325, now seen corresponding path program 509 times [2018-10-01 01:18:21,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:21,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:21,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:21,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:21,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:21,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:21,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:21,293 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:18:21,303 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:18:21,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:21,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:21,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:21,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:21,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:21,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:21,356 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:21,356 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:23,076 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:18:23,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:23,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:23,076 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:18:23,076 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:18:23,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:18:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:18:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 30. [2018-10-01 01:18:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:18:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:18:23,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 21 [2018-10-01 01:18:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:23,761 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:18:23,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:18:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:23,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:23,761 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 01:18:23,761 INFO L423 AbstractCegarLoop]: === Iteration 528 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:23,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1725169853, now seen corresponding path program 510 times [2018-10-01 01:18:23,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:23,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:23,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:23,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:23,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:23,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:23,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:23,827 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:18:23,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:18:23,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:23,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:23,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:23,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:23,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:23,894 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:23,894 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 12 states. [2018-10-01 01:18:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:25,665 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:18:25,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:25,665 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:25,665 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:18:25,666 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:18:25,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:18:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 01:18:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:26,528 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:26,528 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:26,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:26,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:26,528 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:18:26,528 INFO L423 AbstractCegarLoop]: === Iteration 529 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:26,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:26,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1725171775, now seen corresponding path program 511 times [2018-10-01 01:18:26,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:26,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:26,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:26,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:26,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:26,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:26,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:26,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:26,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:26,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:26,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:26,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:26,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:26,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:26,660 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:28,457 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:18:28,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:28,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:28,458 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:18:28,458 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:18:28,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:18:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 01:18:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:18:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:18:29,301 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:18:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:29,301 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:18:29,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:18:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:29,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:29,302 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:18:29,302 INFO L423 AbstractCegarLoop]: === Iteration 530 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:29,302 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:29,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1727016895, now seen corresponding path program 512 times [2018-10-01 01:18:29,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:29,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:29,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:29,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:29,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:29,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:29,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:29,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:18:29,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:18:29,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:29,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:29,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:29,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:29,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:29,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:29,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:29,445 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:18:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:31,191 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:18:31,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:31,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:31,192 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:18:31,192 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:18:31,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:18:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:18:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 01:18:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:32,057 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:32,057 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:32,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:32,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:32,058 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:32,058 INFO L423 AbstractCegarLoop]: === Iteration 531 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:32,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1727018817, now seen corresponding path program 513 times [2018-10-01 01:18:32,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:32,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:32,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:32,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:32,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:32,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:32,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:32,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:18:32,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:18:32,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:32,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:32,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:32,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:32,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:32,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:32,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:32,193 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:33,892 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:18:33,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:33,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:33,893 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:18:33,893 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:18:33,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:18:34,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 01:18:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:18:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:18:34,704 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:18:34,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:34,705 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:18:34,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:18:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:34,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:34,705 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:18:34,705 INFO L423 AbstractCegarLoop]: === Iteration 532 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:34,705 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:34,705 INFO L82 PathProgramCache]: Analyzing trace with hash -794790081, now seen corresponding path program 514 times [2018-10-01 01:18:34,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:34,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:34,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:34,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:34,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:34,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:34,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:34,771 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:18:34,777 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:18:34,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:34,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:34,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:34,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:34,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:34,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:34,834 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:18:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:36,636 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:18:36,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:36,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:36,637 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:18:36,637 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:18:36,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:18:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 01:18:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:37,504 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:37,504 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:37,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:37,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:37,505 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:37,505 INFO L423 AbstractCegarLoop]: === Iteration 533 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:37,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:37,505 INFO L82 PathProgramCache]: Analyzing trace with hash -794788159, now seen corresponding path program 515 times [2018-10-01 01:18:37,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:37,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:37,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:37,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:37,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:37,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:37,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:37,576 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:18:37,589 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:18:37,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:37,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:37,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:37,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:37,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:37,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:37,656 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:39,460 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:18:39,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:39,460 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:39,461 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:18:39,461 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:18:39,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:18:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 01:18:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:18:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:18:40,308 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:18:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:40,308 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:18:40,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:18:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:40,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:40,309 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:40,309 INFO L423 AbstractCegarLoop]: === Iteration 534 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:40,309 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash -792943039, now seen corresponding path program 516 times [2018-10-01 01:18:40,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:40,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:40,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:40,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:40,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:40,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:40,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:40,377 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:18:40,388 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:18:40,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:40,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:40,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:40,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:40,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:40,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:40,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:40,443 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:18:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:42,161 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:18:42,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:42,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:42,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:42,162 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:18:42,162 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:18:42,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:18:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 01:18:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:43,029 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:43,029 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:43,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:43,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:43,030 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:18:43,030 INFO L423 AbstractCegarLoop]: === Iteration 535 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:43,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash -792941117, now seen corresponding path program 517 times [2018-10-01 01:18:43,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:43,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:43,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:43,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:43,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:43,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:43,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:43,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:43,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:43,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:43,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:43,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:43,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:43,163 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:44,879 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:18:44,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:44,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:44,880 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:18:44,880 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:18:44,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:18:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 32. [2018-10-01 01:18:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:18:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:18:45,638 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 01:18:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:45,638 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:18:45,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:18:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:45,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:45,638 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:18:45,638 INFO L423 AbstractCegarLoop]: === Iteration 536 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:45,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1889739073, now seen corresponding path program 518 times [2018-10-01 01:18:45,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:45,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:45,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:45,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:45,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:45,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:45,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:45,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:18:45,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:18:45,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:45,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:45,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:45,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:45,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:45,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:45,770 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:45,770 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 01:18:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:47,443 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:18:47,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:47,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:47,444 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:18:47,444 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:18:47,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:18:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 01:18:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:48,311 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:48,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:48,312 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:48,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:48,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:48,312 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:48,312 INFO L423 AbstractCegarLoop]: === Iteration 537 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:48,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:48,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1889737151, now seen corresponding path program 519 times [2018-10-01 01:18:48,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:48,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:48,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:48,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:48,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:48,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:48,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:48,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:18:48,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:18:48,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:48,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:48,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:48,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:48,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:48,491 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:48,491 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:50,186 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:18:50,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:50,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:50,187 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:18:50,187 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:18:50,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:18:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:18:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:18:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:18:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:18:51,038 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:18:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:51,038 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:18:51,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:18:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:51,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:51,039 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:51,039 INFO L423 AbstractCegarLoop]: === Iteration 538 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:51,039 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:51,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1887892031, now seen corresponding path program 520 times [2018-10-01 01:18:51,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:51,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:51,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:51,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:51,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:51,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:51,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:51,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:18:51,113 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:18:51,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:51,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:51,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:51,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:51,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:51,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:51,182 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:18:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:52,837 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:18:52,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:52,837 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:52,837 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:18:52,838 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:18:52,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:18:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 01:18:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:53,713 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:53,714 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:53,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:53,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:53,714 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:18:53,714 INFO L423 AbstractCegarLoop]: === Iteration 539 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:53,714 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1887890109, now seen corresponding path program 521 times [2018-10-01 01:18:53,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:53,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:53,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:53,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:53,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:53,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:53,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:53,826 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:18:53,841 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:18:53,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:53,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:53,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:53,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:53,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:53,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:53,887 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:18:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:55,579 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:18:55,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:55,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:55,580 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:18:55,580 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:18:55,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:18:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:18:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:18:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:18:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:18:56,417 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:18:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:56,418 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:18:56,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:18:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:56,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:56,418 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:18:56,418 INFO L423 AbstractCegarLoop]: === Iteration 540 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:56,418 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash -114731711, now seen corresponding path program 522 times [2018-10-01 01:18:56,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:56,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:56,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:56,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:56,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:56,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:56,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:56,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:18:56,494 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:18:56,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:56,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:56,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:56,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:56,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:56,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:56,562 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:18:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:58,164 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:18:58,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:18:58,164 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:18:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:58,165 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:18:58,165 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:18:58,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:18:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:18:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 01:18:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:18:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:18:59,044 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:18:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:59,044 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:18:59,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:18:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:18:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:18:59,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:59,044 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:18:59,044 INFO L423 AbstractCegarLoop]: === Iteration 541 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:59,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash -114729789, now seen corresponding path program 523 times [2018-10-01 01:18:59,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:59,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:59,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:59,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:59,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:59,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:59,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:59,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:59,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:59,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:59,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:18:59,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:18:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:18:59,211 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:59,211 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:00,787 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:19:00,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:00,788 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:00,788 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:19:00,788 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:19:00,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:19:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:19:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 01:19:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:19:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:19:01,651 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:19:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:01,651 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:19:01,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:19:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:01,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:01,652 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:19:01,652 INFO L423 AbstractCegarLoop]: === Iteration 542 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:01,652 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:01,652 INFO L82 PathProgramCache]: Analyzing trace with hash -112884669, now seen corresponding path program 524 times [2018-10-01 01:19:01,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:01,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:01,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:01,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:01,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:01,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:01,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:01,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:19:01,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:19:01,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:01,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:01,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:01,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:01,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:01,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:01,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:01,790 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:19:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:03,303 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:19:03,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:03,303 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:03,303 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:19:03,303 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:19:03,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:19:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-10-01 01:19:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:04,185 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:04,185 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:04,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:04,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:04,186 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:19:04,186 INFO L423 AbstractCegarLoop]: === Iteration 543 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:04,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:04,186 INFO L82 PathProgramCache]: Analyzing trace with hash -112882747, now seen corresponding path program 525 times [2018-10-01 01:19:04,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:04,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:04,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:04,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:04,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:04,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:04,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:04,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:19:04,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:19:04,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:04,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:04,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:04,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:04,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:04,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:04,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:04,331 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:05,853 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:19:05,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:05,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:05,853 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:19:05,854 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:19:05,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:19:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-01 01:19:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:19:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:19:06,478 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 21 [2018-10-01 01:19:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:06,479 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:19:06,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:19:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:06,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:06,479 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 01:19:06,479 INFO L423 AbstractCegarLoop]: === Iteration 544 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:06,479 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash 437299261, now seen corresponding path program 526 times [2018-10-01 01:19:06,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:06,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:06,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:06,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:06,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:06,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:06,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:06,551 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:19:06,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:19:06,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:06,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:06,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:06,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:06,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:06,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:06,614 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:06,614 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 12 states. [2018-10-01 01:19:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:08,695 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 01:19:08,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:08,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:08,696 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:19:08,696 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:19:08,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:19:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 01:19:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:09,594 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:09,594 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:09,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:09,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:09,594 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:19:09,594 INFO L423 AbstractCegarLoop]: === Iteration 545 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:09,594 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:09,594 INFO L82 PathProgramCache]: Analyzing trace with hash 437301183, now seen corresponding path program 527 times [2018-10-01 01:19:09,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:09,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:09,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:09,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:09,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:09,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:09,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:09,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:19:09,669 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:19:09,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:09,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:09,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:09,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:09,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:09,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:09,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:09,729 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:11,735 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:19:11,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:11,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:11,736 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:19:11,736 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:19:11,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:19:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:19:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:19:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:19:12,616 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:19:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:12,617 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:19:12,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:19:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:12,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:12,617 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:19:12,617 INFO L423 AbstractCegarLoop]: === Iteration 546 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:12,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash 439146303, now seen corresponding path program 528 times [2018-10-01 01:19:12,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:12,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:12,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:12,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:12,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:12,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:12,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:12,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:19:12,697 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:19:12,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:12,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:12,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:12,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:12,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:12,751 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:12,751 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:19:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:14,823 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 01:19:14,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:14,823 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:14,824 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:19:14,824 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:19:14,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:19:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 01:19:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:15,717 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:15,717 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:15,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:15,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:15,718 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:19:15,718 INFO L423 AbstractCegarLoop]: === Iteration 547 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:15,718 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash 439148225, now seen corresponding path program 529 times [2018-10-01 01:19:15,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:15,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:15,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:15,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:15,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:15,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:15,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:15,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:15,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:15,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:15,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:15,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:15,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:15,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:15,845 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:17,857 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:19:17,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:17,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:17,858 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:19:17,858 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:19:17,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:19:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2018-10-01 01:19:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:19:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:19:18,698 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:19:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:18,698 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:19:18,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:19:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:18,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:18,699 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:19:18,699 INFO L423 AbstractCegarLoop]: === Iteration 548 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:18,699 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:18,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2082660673, now seen corresponding path program 530 times [2018-10-01 01:19:18,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:18,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:18,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:18,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:18,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:18,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:18,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:18,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:19:18,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:19:18,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:18,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:18,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:18,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:18,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:18,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:18,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:18,842 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:19:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:20,778 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:19:20,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:20,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:20,779 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:19:20,779 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:19:20,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:19:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2018-10-01 01:19:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:21,681 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:21,681 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:21,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:21,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:21,681 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:19:21,681 INFO L423 AbstractCegarLoop]: === Iteration 549 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:21,681 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2082658751, now seen corresponding path program 531 times [2018-10-01 01:19:21,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:21,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:21,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:21,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:21,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:21,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:21,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:21,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:19:21,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:19:21,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:21,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:21,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:21,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:21,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:21,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:21,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:21,825 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:23,754 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:19:23,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:23,754 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:23,754 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:19:23,755 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:19:23,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:19:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2018-10-01 01:19:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:19:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:19:24,638 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:19:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:24,638 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:19:24,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:19:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:24,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:24,638 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:19:24,638 INFO L423 AbstractCegarLoop]: === Iteration 550 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:24,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:24,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2080813631, now seen corresponding path program 532 times [2018-10-01 01:19:24,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:24,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:24,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:24,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:24,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:24,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:24,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:24,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:19:24,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:19:24,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:24,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:24,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:24,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:24,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:24,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:24,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:24,827 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:19:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:26,697 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:19:26,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:26,697 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:26,698 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:19:26,698 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:19:26,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:19:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:19:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 01:19:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:27,595 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:27,596 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:27,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:27,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:27,596 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:19:27,596 INFO L423 AbstractCegarLoop]: === Iteration 551 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:27,596 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2080811709, now seen corresponding path program 533 times [2018-10-01 01:19:27,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:27,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:27,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:27,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:27,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:27,683 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:19:27,693 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:19:27,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:27,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:27,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:27,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:27,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:27,747 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:27,748 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:29,608 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:19:29,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:29,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:29,608 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:19:29,608 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:19:29,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:19:29,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:19:30,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 32. [2018-10-01 01:19:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:19:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:19:30,390 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 01:19:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:30,390 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:19:30,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:19:30,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:30,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:30,390 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:19:30,391 INFO L423 AbstractCegarLoop]: === Iteration 552 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:30,391 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:30,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1117357631, now seen corresponding path program 534 times [2018-10-01 01:19:30,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:30,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:30,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:30,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:30,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:30,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:30,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:30,458 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:19:30,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:19:30,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:30,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:30,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:30,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:30,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:30,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:30,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:30,548 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 01:19:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:32,599 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 01:19:32,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:32,599 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:32,600 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:19:32,600 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:19:32,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:19:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:19:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 01:19:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:33,509 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:33,509 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:33,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:33,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:33,510 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:19:33,510 INFO L423 AbstractCegarLoop]: === Iteration 553 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:33,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:33,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1117359553, now seen corresponding path program 535 times [2018-10-01 01:19:33,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:33,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:33,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:33,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:33,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:33,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:33,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:33,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:33,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:33,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:33,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:33,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:33,641 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:33,641 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:35,646 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:19:35,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:35,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:35,647 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:19:35,647 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:19:35,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:35,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:19:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 01:19:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:19:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:19:36,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:19:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:36,525 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:19:36,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:19:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:36,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:36,526 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:19:36,526 INFO L423 AbstractCegarLoop]: === Iteration 554 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:36,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:36,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1119204673, now seen corresponding path program 536 times [2018-10-01 01:19:36,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:36,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:36,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:36,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:36,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:36,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:36,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:36,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:19:36,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:19:36,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:36,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:36,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:36,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:36,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:36,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:36,654 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:19:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:38,731 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 01:19:38,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:38,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:38,732 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:19:38,732 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:19:38,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:38,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:19:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 01:19:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:39,627 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:39,627 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:39,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:39,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:39,628 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:19:39,628 INFO L423 AbstractCegarLoop]: === Iteration 555 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:39,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:39,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1119206595, now seen corresponding path program 537 times [2018-10-01 01:19:39,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:39,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:39,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:39,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:39,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:39,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:39,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:39,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:19:39,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:19:39,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:39,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:39,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:39,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:39,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:39,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:39,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:39,765 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:41,769 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 01:19:41,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:41,769 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:41,770 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:19:41,770 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:19:41,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:19:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2018-10-01 01:19:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:19:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:19:42,611 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:19:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:42,612 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:19:42,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:19:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:42,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:42,612 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:19:42,612 INFO L423 AbstractCegarLoop]: === Iteration 556 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:42,612 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1402602303, now seen corresponding path program 538 times [2018-10-01 01:19:42,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:42,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:42,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:42,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:42,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:42,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:42,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:42,689 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:19:42,697 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:19:42,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:42,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:42,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:42,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:42,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:42,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:42,748 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:19:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:44,670 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:19:44,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:44,670 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:44,670 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:19:44,671 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:19:44,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:19:45,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2018-10-01 01:19:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:45,590 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:45,590 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:45,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:45,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:45,590 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:19:45,591 INFO L423 AbstractCegarLoop]: === Iteration 557 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:45,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1402600381, now seen corresponding path program 539 times [2018-10-01 01:19:45,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:45,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:45,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:45,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:45,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:45,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:45,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:45,656 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:19:45,667 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:19:45,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:45,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:45,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:45,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:45,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:45,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:45,726 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:45,726 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:47,698 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 01:19:47,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:47,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:47,698 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:19:47,699 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:19:47,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:19:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2018-10-01 01:19:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:19:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:19:48,580 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:19:48,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:48,580 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:19:48,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:48,580 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:19:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:48,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:48,580 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:19:48,580 INFO L423 AbstractCegarLoop]: === Iteration 558 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:48,580 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1400755261, now seen corresponding path program 540 times [2018-10-01 01:19:48,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:48,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:48,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:48,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:48,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:48,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:48,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:48,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:19:48,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:19:48,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:48,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:48,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:48,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:48,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:48,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:48,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:48,713 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:19:50,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:50,665 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:19:50,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:50,665 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:50,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:50,666 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:19:50,666 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:19:50,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:19:51,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 01:19:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:51,569 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:51,569 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:51,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:51,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:51,570 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:19:51,570 INFO L423 AbstractCegarLoop]: === Iteration 559 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:51,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:51,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1400753339, now seen corresponding path program 541 times [2018-10-01 01:19:51,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:51,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:51,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:51,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:51,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:51,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:51,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:51,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:51,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:51,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:51,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:51,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:51,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:51,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:51,706 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:53,551 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:19:53,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:53,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:53,552 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:19:53,552 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:19:53,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:19:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 30. [2018-10-01 01:19:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:19:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:19:54,268 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 21 [2018-10-01 01:19:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:54,268 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:19:54,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:19:54,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:54,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:54,269 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:19:54,269 INFO L423 AbstractCegarLoop]: === Iteration 560 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:54,269 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:54,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1138363839, now seen corresponding path program 542 times [2018-10-01 01:19:54,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:54,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:54,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:54,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:54,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:54,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:54,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:54,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:19:54,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:19:54,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:54,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:54,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:54,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:54,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:54,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:54,397 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 12 states. [2018-10-01 01:19:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:56,283 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:19:56,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:56,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:56,284 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:19:56,284 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:19:56,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:19:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:19:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 01:19:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:19:57,190 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:19:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:57,190 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:19:57,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:19:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:19:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:19:57,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:57,191 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:19:57,191 INFO L423 AbstractCegarLoop]: === Iteration 561 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:57,191 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1138365761, now seen corresponding path program 543 times [2018-10-01 01:19:57,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:57,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:57,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:57,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:57,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:57,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:57,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:57,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:19:57,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:19:57,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:57,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:57,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:57,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:19:57,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:19:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:19:57,339 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:57,339 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:19:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:59,263 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:19:59,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:19:59,263 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:19:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:59,264 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:19:59,264 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:19:59,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:19:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:20:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 01:20:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:20:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:20:00,157 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:20:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:00,157 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:20:00,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:20:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:00,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:00,157 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:20:00,157 INFO L423 AbstractCegarLoop]: === Iteration 562 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:00,158 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1140210881, now seen corresponding path program 544 times [2018-10-01 01:20:00,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:00,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:00,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:00,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:00,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:00,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:00,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:00,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:20:00,227 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:20:00,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:00,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:00,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:00,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:00,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:00,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:00,294 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:20:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:02,160 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:20:02,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:02,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:02,160 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:20:02,161 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:20:02,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:20:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 01:20:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:03,078 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:03,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:03,078 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:03,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:03,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:03,078 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:03,078 INFO L423 AbstractCegarLoop]: === Iteration 563 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:03,079 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1140212803, now seen corresponding path program 545 times [2018-10-01 01:20:03,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:03,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:03,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:03,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:03,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:03,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:03,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:03,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:20:03,153 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:20:03,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:03,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:03,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:03,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:03,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:03,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:03,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:03,210 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:05,068 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:20:05,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:05,068 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:05,068 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:20:05,069 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:20:05,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:20:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 01:20:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:20:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:20:05,934 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:20:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:05,935 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:20:05,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:20:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:05,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:05,935 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:20:05,935 INFO L423 AbstractCegarLoop]: === Iteration 564 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:05,935 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1381596095, now seen corresponding path program 546 times [2018-10-01 01:20:05,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:05,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:05,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:05,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:05,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:05,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:05,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:06,000 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:20:06,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:20:06,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:06,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:06,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:06,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:06,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:06,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:06,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:06,068 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:20:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:07,965 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:20:07,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:07,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:07,966 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:20:07,966 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:20:07,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:20:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 01:20:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:08,880 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:08,880 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:08,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:08,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:08,880 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:08,880 INFO L423 AbstractCegarLoop]: === Iteration 565 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:08,880 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1381594173, now seen corresponding path program 547 times [2018-10-01 01:20:08,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:08,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:08,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:08,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:08,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:08,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:08,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:08,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:20:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:08,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:09,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:09,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:09,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:09,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:09,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:09,008 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:10,925 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 01:20:10,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:10,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:10,926 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:20:10,926 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:20:10,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:20:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 01:20:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:20:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:20:11,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:20:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:11,821 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:20:11,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:20:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:11,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:11,821 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:11,821 INFO L423 AbstractCegarLoop]: === Iteration 566 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:11,821 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1379749053, now seen corresponding path program 548 times [2018-10-01 01:20:11,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:11,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:11,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:11,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:20:11,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:11,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:11,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:11,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:20:11,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:20:11,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:11,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:11,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:11,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:11,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:11,965 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:11,965 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:20:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:13,808 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:20:13,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:13,808 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:13,808 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:20:13,809 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:20:13,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:20:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:20:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 01:20:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:14,722 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:14,722 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:14,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:14,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:14,722 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:14,722 INFO L423 AbstractCegarLoop]: === Iteration 567 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:14,722 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1379747131, now seen corresponding path program 549 times [2018-10-01 01:20:14,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:14,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:14,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:14,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:14,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:14,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:14,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:14,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:20:14,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:20:14,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:14,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:14,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:14,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:14,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:14,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:14,857 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:16,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:16,676 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:20:16,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:16,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:16,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:16,677 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:20:16,677 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:20:16,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:20:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 32. [2018-10-01 01:20:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:20:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:20:17,472 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 01:20:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:17,472 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:20:17,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:20:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:17,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:17,473 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:20:17,473 INFO L423 AbstractCegarLoop]: === Iteration 568 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:17,473 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1818422209, now seen corresponding path program 550 times [2018-10-01 01:20:17,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:17,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:17,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:17,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:17,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:17,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:17,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:17,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:20:17,546 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:20:17,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:17,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:17,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:17,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:17,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:17,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:17,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:17,613 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 01:20:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:19,373 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:20:19,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:19,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:19,373 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:20:19,373 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:20:19,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:19,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:20:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 01:20:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:20,291 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:20,291 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:20,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:20,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:20,291 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:20,292 INFO L423 AbstractCegarLoop]: === Iteration 569 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:20,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:20,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1818424131, now seen corresponding path program 551 times [2018-10-01 01:20:20,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:20,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:20,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:20,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:20,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:20,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:20,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:20,356 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:20:20,366 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:20:20,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:20,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:20,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:20,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:20,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:20,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:20,425 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:22,196 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:20:22,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:22,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:22,197 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:20:22,197 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:20:22,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:20:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 01:20:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:20:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:20:23,098 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:20:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:23,098 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:20:23,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:20:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:23,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:23,098 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:23,098 INFO L423 AbstractCegarLoop]: === Iteration 570 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:23,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:23,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1820269251, now seen corresponding path program 552 times [2018-10-01 01:20:23,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:23,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:23,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:23,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:23,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:23,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:23,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:23,165 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:20:23,176 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:20:23,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:23,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:23,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:23,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:23,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:23,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:23,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:23,248 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:20:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:25,020 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:20:25,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:25,020 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:25,020 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:20:25,021 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:20:25,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:20:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:20:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 01:20:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:25,961 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:25,962 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:25,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:25,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:25,962 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:25,962 INFO L423 AbstractCegarLoop]: === Iteration 571 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:25,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:25,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1820271173, now seen corresponding path program 553 times [2018-10-01 01:20:25,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:25,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:25,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:25,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:25,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:26,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:26,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:26,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:20:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:26,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:26,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:26,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:26,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:26,119 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:26,119 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:27,899 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:20:27,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:27,899 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:27,899 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:20:27,899 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:20:27,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:20:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:20:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:20:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:20:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:20:28,757 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:20:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:28,757 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:20:28,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:20:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:28,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:28,757 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:28,757 INFO L423 AbstractCegarLoop]: === Iteration 572 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:28,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash -701537725, now seen corresponding path program 554 times [2018-10-01 01:20:28,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:28,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:28,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:28,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:20:28,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:28,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:28,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:28,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:20:28,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:20:28,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:28,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:28,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:28,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:28,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:28,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:28,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:28,903 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:20:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:30,576 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:20:30,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:30,576 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:30,576 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:20:30,577 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:20:30,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:20:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:20:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 01:20:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:31,509 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:31,509 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:31,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:31,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:31,509 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:31,510 INFO L423 AbstractCegarLoop]: === Iteration 573 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:31,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash -701535803, now seen corresponding path program 555 times [2018-10-01 01:20:31,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:31,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:31,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:31,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:31,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:31,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:31,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:31,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:20:31,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:20:31,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:31,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:31,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:31,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:31,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:31,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:31,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:31,650 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:33,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:33,324 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:20:33,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:33,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:33,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:33,324 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:20:33,325 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:20:33,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:20:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 01:20:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:20:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:20:34,225 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:20:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:34,225 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:20:34,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:20:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:34,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:34,226 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:20:34,226 INFO L423 AbstractCegarLoop]: === Iteration 574 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:34,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:34,226 INFO L82 PathProgramCache]: Analyzing trace with hash -699690683, now seen corresponding path program 556 times [2018-10-01 01:20:34,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:34,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:34,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:34,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:34,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:34,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:34,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:34,290 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:20:34,298 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:20:34,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:34,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:34,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:34,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:34,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:34,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:34,367 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:20:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:35,956 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:20:35,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:35,956 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:35,956 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:20:35,957 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:20:35,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:20:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-10-01 01:20:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:36,884 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:36,884 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:36,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:36,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:36,884 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:20:36,884 INFO L423 AbstractCegarLoop]: === Iteration 575 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:36,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:36,885 INFO L82 PathProgramCache]: Analyzing trace with hash -699688761, now seen corresponding path program 557 times [2018-10-01 01:20:36,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:36,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:36,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:36,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:36,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:36,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:36,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:36,950 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:20:36,961 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:20:36,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:36,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:37,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:37,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:37,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:37,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:37,027 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:38,572 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:20:38,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:38,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:38,572 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:20:38,573 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:20:38,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:20:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-01 01:20:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:20:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 01:20:39,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 21 [2018-10-01 01:20:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:39,165 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 01:20:39,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 01:20:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:39,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:39,166 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 01:20:39,166 INFO L423 AbstractCegarLoop]: === Iteration 576 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:39,166 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash -255758403, now seen corresponding path program 558 times [2018-10-01 01:20:39,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:39,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:39,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:39,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:39,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:39,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:39,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:39,231 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:20:39,242 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:20:39,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:39,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:39,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:39,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:39,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:39,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:39,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:39,312 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 12 states. [2018-10-01 01:20:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:41,218 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:20:41,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:41,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:41,218 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:20:41,218 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:20:41,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:41,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:20:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 01:20:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:42,191 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:42,191 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:42,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:42,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:42,191 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:20:42,191 INFO L423 AbstractCegarLoop]: === Iteration 577 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:42,191 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash -255756481, now seen corresponding path program 559 times [2018-10-01 01:20:42,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:42,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:42,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:42,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:42,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:42,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:20:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:42,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:42,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:42,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:42,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:42,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:42,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:42,333 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:44,247 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:20:44,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:44,247 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:44,248 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:20:44,248 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:20:44,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:20:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:20:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:20:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:20:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:20:45,199 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:20:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:45,200 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:20:45,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:20:45,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:45,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:45,200 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:20:45,200 INFO L423 AbstractCegarLoop]: === Iteration 578 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:45,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash -253911361, now seen corresponding path program 560 times [2018-10-01 01:20:45,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:45,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:45,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:45,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:20:45,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:45,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:45,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:45,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:20:45,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:20:45,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:45,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:45,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:45,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:45,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:45,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:45,339 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:20:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:47,239 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:20:47,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:47,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:47,240 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:20:47,240 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:20:47,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:20:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 01:20:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:48,213 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:48,213 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:48,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:48,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:48,213 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:20:48,213 INFO L423 AbstractCegarLoop]: === Iteration 579 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:48,213 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -253909439, now seen corresponding path program 561 times [2018-10-01 01:20:48,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:48,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:48,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:48,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:48,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:48,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:48,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:48,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:20:48,319 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:20:48,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:48,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:48,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:48,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:48,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:48,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:48,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:48,368 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:50,160 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:20:50,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:50,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:50,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:50,161 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:20:50,161 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:20:50,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:20:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:20:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:20:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:20:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:20:51,074 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:20:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:51,074 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:20:51,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:20:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:51,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:51,074 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:20:51,074 INFO L423 AbstractCegarLoop]: === Iteration 580 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:51,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1519248959, now seen corresponding path program 562 times [2018-10-01 01:20:51,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:51,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:51,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:51,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:51,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:51,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:51,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:51,142 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:20:51,148 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:20:51,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:51,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:51,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:51,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:51,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:51,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:51,203 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:20:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:53,132 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:20:53,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:53,132 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:53,132 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:20:53,132 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:20:53,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:20:54,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 01:20:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:20:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:20:54,104 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:20:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:54,104 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:20:54,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:20:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:54,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:54,105 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:20:54,105 INFO L423 AbstractCegarLoop]: === Iteration 581 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:54,105 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1519250881, now seen corresponding path program 563 times [2018-10-01 01:20:54,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:54,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:54,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:54,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:54,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:54,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:54,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:54,178 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:20:54,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:20:54,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:54,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:54,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:54,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:54,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:54,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:54,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:54,245 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:20:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:56,184 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:20:56,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:56,184 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:56,185 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:20:56,185 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:20:56,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:20:57,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:20:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:20:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:20:57,143 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:20:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:57,143 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:20:57,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:20:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:20:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:20:57,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:57,144 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:20:57,144 INFO L423 AbstractCegarLoop]: === Iteration 582 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:57,144 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:57,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1521096001, now seen corresponding path program 564 times [2018-10-01 01:20:57,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:57,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:57,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:57,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:57,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:57,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:57,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:57,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:20:57,222 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:20:57,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:57,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:57,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:57,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:20:57,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:20:57,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:20:57,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:57,289 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:20:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:59,155 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:20:59,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:20:59,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:20:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:59,155 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:20:59,156 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:20:59,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:20:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:21:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 01:21:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:00,130 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:00,130 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:00,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:00,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:00,130 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:00,130 INFO L423 AbstractCegarLoop]: === Iteration 583 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:00,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1521097923, now seen corresponding path program 565 times [2018-10-01 01:21:00,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:00,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:00,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:00,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:00,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:00,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:00,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:00,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:00,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:00,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:00,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:00,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:00,256 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:00,256 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:02,105 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:21:02,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:02,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:02,106 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:21:02,106 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:21:02,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:21:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:21:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:21:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:21:02,956 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 01:21:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:02,956 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:21:02,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:21:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:02,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:02,956 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:21:02,956 INFO L423 AbstractCegarLoop]: === Iteration 584 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:02,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash 424299967, now seen corresponding path program 566 times [2018-10-01 01:21:02,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:02,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:02,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:02,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:02,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:03,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:03,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:03,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:21:03,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:21:03,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:03,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:03,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:03,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:03,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:03,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:03,086 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 01:21:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:04,892 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:21:04,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:04,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:04,892 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:21:04,893 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:21:04,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:21:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-10-01 01:21:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:05,873 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:05,873 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:05,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:05,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:05,873 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:21:05,873 INFO L423 AbstractCegarLoop]: === Iteration 585 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:05,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:05,874 INFO L82 PathProgramCache]: Analyzing trace with hash 424301889, now seen corresponding path program 567 times [2018-10-01 01:21:05,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:05,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:05,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:05,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:05,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:05,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:05,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:05,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:21:05,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:21:05,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:05,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:06,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:06,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:06,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:06,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:06,006 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:07,733 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:21:07,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:07,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:07,734 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:21:07,734 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:21:07,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:21:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 01:21:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:21:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:21:08,694 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:21:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:08,694 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:21:08,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:21:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:08,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:08,694 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:21:08,695 INFO L423 AbstractCegarLoop]: === Iteration 586 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:08,695 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash 426147009, now seen corresponding path program 568 times [2018-10-01 01:21:08,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:08,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:08,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:08,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:08,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:08,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:08,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:08,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:21:08,769 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:21:08,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:08,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:08,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:08,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:08,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:08,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:08,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:08,824 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:21:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:10,610 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:21:10,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:10,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:10,611 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:21:10,611 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:21:10,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:21:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-10-01 01:21:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:11,590 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:11,591 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:11,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:11,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:11,591 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:11,591 INFO L423 AbstractCegarLoop]: === Iteration 587 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:11,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash 426148931, now seen corresponding path program 569 times [2018-10-01 01:21:11,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:11,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:11,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:11,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:11,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:11,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:11,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:11,652 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:21:11,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:21:11,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:11,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:11,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:11,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:11,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:11,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:11,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:11,730 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:13,454 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:21:13,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:13,454 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:13,455 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:21:13,455 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:21:13,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:21:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:21:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:21:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:21:14,371 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:21:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:14,371 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:21:14,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:21:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:14,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:14,371 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:21:14,371 INFO L423 AbstractCegarLoop]: === Iteration 588 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:14,371 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2095659967, now seen corresponding path program 570 times [2018-10-01 01:21:14,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:14,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:14,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:14,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:14,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:14,436 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:21:14,447 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:21:14,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:14,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:14,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:14,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:14,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:14,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:14,508 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:21:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:16,169 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:21:16,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:16,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:16,169 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:21:16,170 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:21:16,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:21:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-10-01 01:21:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:17,159 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:17,159 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:17,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:17,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:17,160 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:17,160 INFO L423 AbstractCegarLoop]: === Iteration 589 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:17,160 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:17,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2095658045, now seen corresponding path program 571 times [2018-10-01 01:21:17,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:17,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:17,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:17,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:17,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:17,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:17,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:17,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:17,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:17,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:17,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:17,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:17,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:17,309 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:18,979 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:21:18,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:18,979 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:18,979 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:21:18,980 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:21:18,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:21:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:21:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:21:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:21:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:21:19,945 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:21:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:19,945 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:21:19,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:21:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:19,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:19,946 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:19,946 INFO L423 AbstractCegarLoop]: === Iteration 590 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:19,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2093812925, now seen corresponding path program 572 times [2018-10-01 01:21:19,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:19,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:19,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:19,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:19,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:20,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:20,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:20,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:21:20,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:21:20,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:20,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:20,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:20,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:20,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:20,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:20,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:20,090 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:21:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:21,724 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:21:21,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:21,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:21,724 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:21:21,725 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:21:21,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:21:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:21:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-01 01:21:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:22,718 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:22,718 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:22,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:22,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:22,719 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:22,719 INFO L423 AbstractCegarLoop]: === Iteration 591 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:22,719 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:22,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2093811003, now seen corresponding path program 573 times [2018-10-01 01:21:22,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:22,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:22,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:22,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:22,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:22,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:22,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:22,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:21:22,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:21:22,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:22,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:22,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:22,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:22,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:22,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:22,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:22,859 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:24,433 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:21:24,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:24,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:24,433 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:21:24,434 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:21:24,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:24,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:21:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 01:21:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:21:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 01:21:25,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 21 [2018-10-01 01:21:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:25,227 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 01:21:25,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 01:21:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:25,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:25,227 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:21:25,228 INFO L423 AbstractCegarLoop]: === Iteration 592 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:25,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:25,228 INFO L82 PathProgramCache]: Analyzing trace with hash 445306175, now seen corresponding path program 574 times [2018-10-01 01:21:25,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:25,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:25,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:25,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:25,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:25,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:25,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:25,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:21:25,301 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:21:25,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:25,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:25,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:25,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:25,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:25,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:25,372 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 12 states. [2018-10-01 01:21:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:27,357 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:21:27,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:27,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:27,357 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:21:27,357 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:21:27,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:21:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:21:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 01:21:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:28,351 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:28,352 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:28,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:28,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:28,352 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:21:28,352 INFO L423 AbstractCegarLoop]: === Iteration 593 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:28,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:28,352 INFO L82 PathProgramCache]: Analyzing trace with hash 445308097, now seen corresponding path program 575 times [2018-10-01 01:21:28,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:28,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:28,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:28,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:28,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:28,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:28,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:28,426 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:21:28,437 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:21:28,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:28,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:28,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:28,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:28,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:28,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:28,508 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:30,509 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:21:30,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:30,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:30,510 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:21:30,510 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:21:30,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:21:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:21:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:21:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:21:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:21:31,488 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:21:31,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:31,489 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:21:31,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:21:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:31,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:31,489 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:21:31,489 INFO L423 AbstractCegarLoop]: === Iteration 594 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:31,489 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 447153217, now seen corresponding path program 576 times [2018-10-01 01:21:31,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:31,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:31,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:31,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:31,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:31,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:31,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:31,556 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:21:31,565 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:21:31,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:31,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:31,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:31,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:31,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:31,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:31,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:31,621 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:21:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:33,503 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:21:33,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:33,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:33,504 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:21:33,504 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:21:33,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:21:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 01:21:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:34,502 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:34,502 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:34,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:34,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:34,503 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:34,503 INFO L423 AbstractCegarLoop]: === Iteration 595 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:34,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 447155139, now seen corresponding path program 577 times [2018-10-01 01:21:34,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:34,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:34,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:34,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:34,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:34,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:34,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:34,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:34,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:34,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:34,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:34,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:34,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:34,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:34,634 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:36,447 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:21:36,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:36,447 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:36,447 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:21:36,448 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:21:36,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:21:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 01:21:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:21:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:21:37,384 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:21:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:37,384 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:21:37,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:21:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:37,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:37,384 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:21:37,384 INFO L423 AbstractCegarLoop]: === Iteration 596 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:37,384 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:37,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2074653759, now seen corresponding path program 578 times [2018-10-01 01:21:37,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:37,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:37,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:37,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:37,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:37,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:37,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:37,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:21:37,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:21:37,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:37,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:37,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:37,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:37,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:37,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:37,527 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:21:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:39,475 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:21:39,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:39,476 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:39,476 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:21:39,476 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:21:39,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:21:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 01:21:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:40,471 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:40,471 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:40,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:40,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:40,471 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:40,472 INFO L423 AbstractCegarLoop]: === Iteration 597 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:40,472 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:40,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2074651837, now seen corresponding path program 579 times [2018-10-01 01:21:40,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:40,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:40,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:40,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:40,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:40,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:40,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:40,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:21:40,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:21:40,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:40,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:40,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:40,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:40,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:40,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:40,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:40,602 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:42,575 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 01:21:42,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:42,576 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:42,576 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:21:42,576 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:21:42,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:21:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 01:21:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:21:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:21:43,563 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:21:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:43,564 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:21:43,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:21:43,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:43,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:43,564 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:43,564 INFO L423 AbstractCegarLoop]: === Iteration 598 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:43,564 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:43,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2072806717, now seen corresponding path program 580 times [2018-10-01 01:21:43,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:43,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:43,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:43,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:43,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:43,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:43,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:43,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:21:43,636 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:21:43,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:43,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:43,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:43,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:43,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:43,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:43,708 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:43,708 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:21:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:45,627 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 01:21:45,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:45,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:45,627 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:21:45,628 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:21:45,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:21:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:21:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 01:21:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:46,630 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:46,631 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:46,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:46,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:46,631 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:46,631 INFO L423 AbstractCegarLoop]: === Iteration 599 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:46,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:46,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2072804795, now seen corresponding path program 581 times [2018-10-01 01:21:46,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:46,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:46,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:46,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:46,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:46,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:46,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:46,699 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:21:46,710 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:21:46,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:46,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:46,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:46,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:46,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:46,768 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:46,768 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:48,584 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:21:48,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:48,585 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:48,585 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:21:48,585 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:21:48,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:21:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 01:21:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:21:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 01:21:49,452 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 01:21:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:49,452 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 01:21:49,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 01:21:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:49,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:49,452 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:21:49,452 INFO L423 AbstractCegarLoop]: === Iteration 600 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:49,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1125364545, now seen corresponding path program 582 times [2018-10-01 01:21:49,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:49,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:49,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:49,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:49,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:49,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:49,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:49,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:21:49,528 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:21:49,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:49,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:49,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:49,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:49,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:49,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:49,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:49,599 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 01:21:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:51,424 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:21:51,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:51,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:51,425 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:21:51,425 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:21:51,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:21:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-10-01 01:21:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:52,419 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:52,419 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:52,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:52,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:52,420 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:52,420 INFO L423 AbstractCegarLoop]: === Iteration 601 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:52,420 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:52,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1125366467, now seen corresponding path program 583 times [2018-10-01 01:21:52,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:52,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:52,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:52,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:52,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:52,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:52,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:52,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:52,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:52,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:52,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:52,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:52,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:52,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:52,548 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:21:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:54,313 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:21:54,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:54,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:54,314 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:21:54,314 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:21:54,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:21:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 01:21:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:21:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:21:55,291 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:21:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:55,291 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:21:55,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:21:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:55,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:55,292 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:55,292 INFO L423 AbstractCegarLoop]: === Iteration 602 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:55,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1127211587, now seen corresponding path program 584 times [2018-10-01 01:21:55,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:55,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:55,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:55,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:55,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:55,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:55,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:55,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:21:55,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:21:55,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:55,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:55,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:55,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:55,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:55,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:55,429 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:21:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:57,239 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 01:21:57,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:21:57,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:21:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:57,239 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:21:57,240 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:21:57,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:21:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:21:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-10-01 01:21:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:21:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:21:58,244 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:21:58,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:58,244 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:21:58,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:21:58,244 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:21:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:21:58,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:58,245 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:21:58,245 INFO L423 AbstractCegarLoop]: === Iteration 603 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:58,245 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1127213509, now seen corresponding path program 585 times [2018-10-01 01:21:58,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:58,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:58,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:58,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:58,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:58,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:58,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:58,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:21:58,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:21:58,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:58,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:58,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:58,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:21:58,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:21:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:21:58,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:58,424 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:22:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:00,172 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:22:00,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:22:00,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:22:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:00,172 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:22:00,173 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:22:00,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:22:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:22:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 01:22:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:22:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 01:22:01,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 01:22:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:01,106 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 01:22:01,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:22:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 01:22:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:22:01,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:01,106 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:22:01,106 INFO L423 AbstractCegarLoop]: === Iteration 604 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:01,106 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:01,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1394595389, now seen corresponding path program 586 times [2018-10-01 01:22:01,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:01,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:01,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:01,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:01,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:01,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:01,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:01,170 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:22:01,176 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:22:01,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:01,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:01,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:01,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:22:01,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:22:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:22:01,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:01,234 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 01:22:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:02,936 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:22:02,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:22:02,936 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:22:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:02,936 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:22:02,937 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:22:02,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:22:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:22:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-10-01 01:22:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:22:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:22:03,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:22:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:03,940 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:22:03,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:22:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:22:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:22:03,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:03,940 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:22:03,940 INFO L423 AbstractCegarLoop]: === Iteration 605 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:03,940 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1394593467, now seen corresponding path program 587 times [2018-10-01 01:22:03,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:03,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:03,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:03,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:03,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:04,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:04,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:04,008 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:22:04,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:22:04,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:04,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:04,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:04,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:22:04,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:22:04,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:22:04,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:04,091 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:22:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:05,786 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:22:05,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:22:05,786 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:22:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:05,786 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:22:05,786 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:22:05,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:22:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:22:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:22:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:22:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 01:22:06,772 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 01:22:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:06,772 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 01:22:06,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:22:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 01:22:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:22:06,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:06,773 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 01:22:06,773 INFO L423 AbstractCegarLoop]: === Iteration 606 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:06,773 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1392748347, now seen corresponding path program 588 times [2018-10-01 01:22:06,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:06,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:06,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:06,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:06,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:06,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:06,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:06,842 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:22:06,852 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:22:06,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:06,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:06,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:06,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:22:06,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:22:06,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:22:06,909 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:06,909 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 01:22:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:08,533 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 01:22:08,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:22:08,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:22:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:08,533 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:22:08,533 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:22:08,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:22:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:22:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-01 01:22:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:22:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:22:09,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:22:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:09,547 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:22:09,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:22:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:22:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:22:09,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:09,547 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:22:09,547 INFO L423 AbstractCegarLoop]: === Iteration 607 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:09,547 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:09,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1392746425, now seen corresponding path program 589 times [2018-10-01 01:22:09,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:09,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:09,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:09,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:09,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:09,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:09,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:09,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:22:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:09,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:09,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:09,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:22:09,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:22:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:22:09,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:09,685 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:22:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:11,269 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 01:22:11,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:22:11,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:22:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:11,269 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:22:11,270 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:22:11,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:22:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:22:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-01 01:22:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:22:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 01:22:11,982 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 21 [2018-10-01 01:22:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:11,982 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 01:22:11,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:22:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 01:22:11,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:22:11,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:11,982 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 01:22:11,982 INFO L423 AbstractCegarLoop]: === Iteration 608 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:11,983 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:11,983 INFO L82 PathProgramCache]: Analyzing trace with hash -842564417, now seen corresponding path program 590 times [2018-10-01 01:22:11,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:11,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:11,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:11,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:22:11,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:12,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:12,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:12,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:22:12,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:22:12,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:12,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:12,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:12,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:22:12,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:22:12,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:22:12,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:12,111 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 12 states. [2018-10-01 01:22:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:13,849 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 01:22:13,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:22:13,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:22:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:13,850 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:22:13,850 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:22:13,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:22:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:22:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 01:22:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:22:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 01:22:14,871 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 01:22:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:14,871 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 01:22:14,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:22:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 01:22:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:22:14,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:14,872 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 01:22:14,872 INFO L423 AbstractCegarLoop]: === Iteration 609 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:14,872 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash -842562495, now seen corresponding path program 591 times [2018-10-01 01:22:14,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:14,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:14,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:14,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:14,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:14,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:14,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:14,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:22:14,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:22:14,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:14,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:15,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:15,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:22:15,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:22:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:22:15,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:15,005 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 01:22:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:16,791 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 01:22:16,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:22:16,791 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 01:22:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:16,791 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:22:16,791 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:22:16,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:22:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. Received shutdown request... [2018-10-01 01:22:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 01:22:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:22:17,802 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 01:22:17,807 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 01:22:17,807 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 01:22:17 BoogieIcfgContainer [2018-10-01 01:22:17,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 01:22:17,807 INFO L168 Benchmark]: Toolchain (without parser) took 842941.22 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -273.7 MB). Peak memory consumption was 828.4 MB. Max. memory is 7.1 GB. [2018-10-01 01:22:17,809 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:22:17,809 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:22:17,810 INFO L168 Benchmark]: Boogie Preprocessor took 28.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:22:17,810 INFO L168 Benchmark]: RCFGBuilder took 295.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 01:22:17,810 INFO L168 Benchmark]: TraceAbstraction took 842564.03 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -294.8 MB). Peak memory consumption was 807.3 MB. Max. memory is 7.1 GB. [2018-10-01 01:22:17,812 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.63 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 28.30 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 295.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 842564.03 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -294.8 MB). Peak memory consumption was 807.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 842.4s OverallTime, 609 OverallIterations, 9 TraceHistogramMax, 511.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2438 SDtfs, 5079 SDslu, 8159 SDs, 0 SdLazy, 14008 SolverSat, 9936 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15838 GetRequests, 10761 SyntacticMatches, 0 SemanticMatches, 5077 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=512, 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: 231.3s AutomataMinimizationTime, 609 MinimizatonAttempts, 11196 StatesRemovedByMinimization, 608 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 5.6s SatisfiabilityAnalysisTime, 73.4s InterpolantComputationTime, 21523 NumberOfCodeBlocks, 21523 NumberOfCodeBlocksAsserted, 3651 NumberOfCheckSat, 20306 ConstructedInterpolants, 0 QuantifiedInterpolants, 1005512 SizeOfPredicates, 608 NumberOfNonLiveVariables, 27812 ConjunctsInSsa, 5684 ConjunctsInUnsatCore, 1217 InterpolantComputations, 1 PerfectInterpolantSequences, 0/68088 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/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_01-22-17-820.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_01-22-17-820.csv Completed graceful shutdown