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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:59:31,244 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:59:31,249 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:59:31,267 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 00:59:31,299 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 00:59:31,314 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:59:31,315 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:59:31,315 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:59:31,316 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:59:31,317 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:59:31,317 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:59:31,317 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:59:31,317 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:59:31,317 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:59:31,318 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:59:31,318 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:59:31,318 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:59:31,318 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:59:31,319 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:59:31,320 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:59:31,320 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:59:31,320 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:59:31,320 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:59:31,320 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:59:31,320 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:59:31,321 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:59:31,321 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:59:31,321 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:59:31,321 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:59:31,322 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:59:31,323 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:59:31,323 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:59:31,323 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:59:31,323 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:59:31,323 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:59:31,324 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 00:59:31,368 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:59:31,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:59:31,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:59:31,389 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:59:31,389 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:59:31,390 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-01 00:59:31,390 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-10-01 00:59:31,443 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:59:31,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:59:31,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:59:31,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:59:31,448 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:59:31,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,487 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-01 00:59:31,487 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-01 00:59:31,487 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-01 00:59:31,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:59:31,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:59:31,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:59:31,491 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:59:31,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... [2018-10-01 00:59:31,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:59:31,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:59:31,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:59:31,515 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:59:31,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:59:31,574 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-01 00:59:31,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-01 00:59:31,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-01 00:59:31,747 INFO L345 CfgBuilder]: Using library mode [2018-10-01 00:59:31,748 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:59:31 BoogieIcfgContainer [2018-10-01 00:59:31,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:59:31,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:59:31,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:59:31,753 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:59:31,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:59:31" (1/2) ... [2018-10-01 00:59:31,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d1ba19 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:59:31, skipping insertion in model container [2018-10-01 00:59:31,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:59:31" (2/2) ... [2018-10-01 00:59:31,756 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-01 00:59:31,766 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:59:31,774 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:59:31,829 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:59:31,830 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:59:31,830 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:59:31,830 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:59:31,830 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:59:31,831 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:59:31,831 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:59:31,831 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:59:31,831 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:59:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-01 00:59:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-01 00:59:31,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:31,859 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-01 00:59:31,863 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:31,871 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-01 00:59:31,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:31,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:31,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:31,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:31,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:32,117 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:59:32,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-01 00:59:32,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 00:59:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 00:59:32,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:32,140 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-01 00:59:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:32,433 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-01 00:59:32,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 00:59:32,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-01 00:59:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:32,457 INFO L225 Difference]: With dead ends: 9 [2018-10-01 00:59:32,457 INFO L226 Difference]: Without dead ends: 4 [2018-10-01 00:59:32,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 00:59:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-01 00:59:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-01 00:59:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-01 00:59:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-01 00:59:32,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-01 00:59:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:32,502 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-01 00:59:32,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 00:59:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-01 00:59:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-01 00:59:32,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:32,503 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-01 00:59:32,503 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:32,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-01 00:59:32,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:32,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:32,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:32,618 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 00:59:32,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:32,618 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) [2018-10-01 00:59:32,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:32,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:32,730 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 00:59:32,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:32,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-01 00:59:32,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 00:59:32,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 00:59:32,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:32,754 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-10-01 00:59:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:32,968 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-01 00:59:32,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:59:32,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-10-01 00:59:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:32,971 INFO L225 Difference]: With dead ends: 6 [2018-10-01 00:59:32,972 INFO L226 Difference]: Without dead ends: 5 [2018-10-01 00:59:32,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:59:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-01 00:59:32,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-01 00:59:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-01 00:59:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-01 00:59:32,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-01 00:59:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:32,978 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-01 00:59:32,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 00:59:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-01 00:59:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 00:59:32,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:32,979 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-01 00:59:32,980 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:32,980 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-01 00:59:32,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:32,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:32,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:32,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:32,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:33,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:33,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:33,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:59:33,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:59:33,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:33,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:33,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:33,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-01 00:59:33,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:59:33,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:59:33,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:33,527 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-10-01 00:59:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:34,035 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-01 00:59:34,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:59:34,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-10-01 00:59:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:34,037 INFO L225 Difference]: With dead ends: 7 [2018-10-01 00:59:34,037 INFO L226 Difference]: Without dead ends: 6 [2018-10-01 00:59:34,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:59:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-01 00:59:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-01 00:59:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-01 00:59:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-01 00:59:34,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-01 00:59:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:34,042 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-01 00:59:34,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:59:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-01 00:59:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-01 00:59:34,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:34,043 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-01 00:59:34,043 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:34,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:34,044 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-01 00:59:34,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:34,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:34,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:34,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:34,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:34,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:34,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:34,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:59:34,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-01 00:59:34,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:34,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:34,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:34,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-01 00:59:34,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:59:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:59:34,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:34,364 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-10-01 00:59:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:34,538 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-01 00:59:34,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:59:34,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-10-01 00:59:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:34,540 INFO L225 Difference]: With dead ends: 8 [2018-10-01 00:59:34,540 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 00:59:34,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:59:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 00:59:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 00:59:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 00:59:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-01 00:59:34,544 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-01 00:59:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:34,544 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-01 00:59:34,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:59:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-01 00:59:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:59:34,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:34,545 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-01 00:59:34,545 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:34,546 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:34,546 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-01 00:59:34,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:34,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:34,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:34,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:34,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:34,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:34,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:34,779 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:59:34,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:59:34,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:34,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:35,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:35,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-01 00:59:35,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:59:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:59:35,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:35,163 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-10-01 00:59:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:35,508 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-01 00:59:35,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:59:35,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-10-01 00:59:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:35,509 INFO L225 Difference]: With dead ends: 9 [2018-10-01 00:59:35,509 INFO L226 Difference]: Without dead ends: 8 [2018-10-01 00:59:35,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:59:35,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-01 00:59:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-01 00:59:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 00:59:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-01 00:59:35,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-01 00:59:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:35,512 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-01 00:59:35,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:59:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-01 00:59:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 00:59:35,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:35,513 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-01 00:59:35,514 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:35,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:35,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-01 00:59:35,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:35,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:35,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:35,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:35,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:35,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:35,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:35,648 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:59:35,680 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-01 00:59:35,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:35,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:35,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:35,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-01 00:59:35,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:59:35,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:59:35,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:35,994 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-10-01 00:59:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:36,413 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-01 00:59:36,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:59:36,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-10-01 00:59:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:36,414 INFO L225 Difference]: With dead ends: 10 [2018-10-01 00:59:36,414 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 00:59:36,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:59:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 00:59:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 00:59:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:59:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-01 00:59:36,418 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-01 00:59:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:36,420 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-01 00:59:36,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:59:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-01 00:59:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:59:36,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:36,421 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-01 00:59:36,422 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:36,422 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:36,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-01 00:59:36,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:36,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:36,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:36,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:36,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:36,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:36,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:36,626 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:59:36,638 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-01 00:59:36,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:36,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:36,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:36,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-01 00:59:36,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:59:36,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:59:36,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:36,862 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-10-01 00:59:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:37,319 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-01 00:59:37,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:59:37,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-10-01 00:59:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:37,321 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:59:37,321 INFO L226 Difference]: Without dead ends: 10 [2018-10-01 00:59:37,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:59:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-01 00:59:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-01 00:59:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 00:59:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-01 00:59:37,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-01 00:59:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:37,326 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-01 00:59:37,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:59:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-01 00:59:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 00:59:37,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:37,327 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-01 00:59:37,327 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:37,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:37,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-01 00:59:37,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:37,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:37,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:37,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:37,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:37,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:37,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:37,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:37,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:37,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:37,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-01 00:59:37,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:59:37,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:59:37,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:37,701 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-10-01 00:59:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:38,270 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-01 00:59:38,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:59:38,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-10-01 00:59:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:38,272 INFO L225 Difference]: With dead ends: 12 [2018-10-01 00:59:38,272 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 00:59:38,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:59:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 00:59:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 00:59:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:59:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-01 00:59:38,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-01 00:59:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:38,277 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-01 00:59:38,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:59:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-01 00:59:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:59:38,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:38,278 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-01 00:59:38,278 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:38,278 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-01 00:59:38,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:38,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:38,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:38,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:38,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:38,452 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 00:59:38,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:38,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:38,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:59:38,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:59:38,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:38,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:38,778 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 00:59:38,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:38,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-01 00:59:38,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:59:38,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:59:38,818 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:38,818 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-10-01 00:59:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:39,530 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-01 00:59:39,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:59:39,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-10-01 00:59:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:39,532 INFO L225 Difference]: With dead ends: 13 [2018-10-01 00:59:39,532 INFO L226 Difference]: Without dead ends: 12 [2018-10-01 00:59:39,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:59:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-01 00:59:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-01 00:59:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 00:59:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-01 00:59:39,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-01 00:59:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:39,536 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-01 00:59:39,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:59:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-01 00:59:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 00:59:39,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:39,537 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-01 00:59:39,537 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:39,537 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-01 00:59:39,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:39,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:39,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:39,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:39,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:39,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:39,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:39,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:59:39,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 00:59:39,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:39,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:40,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:40,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-01 00:59:40,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:59:40,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:59:40,121 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:40,121 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-10-01 00:59:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:40,834 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-01 00:59:40,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:59:40,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-10-01 00:59:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:40,836 INFO L225 Difference]: With dead ends: 14 [2018-10-01 00:59:40,836 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:59:40,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:59:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:59:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 00:59:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 00:59:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-01 00:59:40,840 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-01 00:59:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:40,841 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-01 00:59:40,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:59:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-01 00:59:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 00:59:40,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:40,842 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-01 00:59:40,842 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:40,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-01 00:59:40,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:40,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:40,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:40,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:40,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:41,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:41,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:41,090 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:59:41,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:59:41,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:41,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:41,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:41,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-01 00:59:41,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:59:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:59:41,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:41,630 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-10-01 00:59:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:42,583 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-01 00:59:42,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:59:42,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-10-01 00:59:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:42,585 INFO L225 Difference]: With dead ends: 15 [2018-10-01 00:59:42,585 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 00:59:42,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:59:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 00:59:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-01 00:59:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 00:59:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-01 00:59:42,589 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-01 00:59:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:42,589 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-01 00:59:42,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:59:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-01 00:59:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 00:59:42,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:42,590 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-01 00:59:42,590 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:42,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-01 00:59:42,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:42,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:42,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:42,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:42,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:42,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:42,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:42,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:59:42,924 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 00:59:42,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:42,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:43,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:43,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-01 00:59:43,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:59:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:59:43,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:43,597 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-10-01 00:59:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:44,877 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-01 00:59:44,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:59:44,877 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-10-01 00:59:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:44,878 INFO L225 Difference]: With dead ends: 16 [2018-10-01 00:59:44,878 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 00:59:44,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:59:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 00:59:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 00:59:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 00:59:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-01 00:59:44,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-01 00:59:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:44,883 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-01 00:59:44,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:59:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-01 00:59:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:59:44,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:44,883 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-01 00:59:44,884 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:44,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-01 00:59:44,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:44,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:44,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:44,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:44,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:45,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:45,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:45,336 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:59:45,352 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 00:59:45,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:45,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:45,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:45,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-01 00:59:45,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 00:59:45,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 00:59:45,722 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:45,722 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-10-01 00:59:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:47,058 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-01 00:59:47,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:59:47,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-10-01 00:59:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:47,060 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:59:47,060 INFO L226 Difference]: Without dead ends: 16 [2018-10-01 00:59:47,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:59:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-01 00:59:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-01 00:59:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 00:59:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-01 00:59:47,065 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-01 00:59:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:47,065 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-01 00:59:47,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 00:59:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-01 00:59:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 00:59:47,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:47,066 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-01 00:59:47,066 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:47,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:47,066 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-01 00:59:47,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:47,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:47,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:47,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:47,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:47,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:47,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:47,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:47,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:48,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:48,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-01 00:59:48,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:59:48,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:59:48,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:48,158 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-10-01 00:59:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:49,807 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-01 00:59:49,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:59:49,808 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-10-01 00:59:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:49,809 INFO L225 Difference]: With dead ends: 18 [2018-10-01 00:59:49,809 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 00:59:49,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:59:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 00:59:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 00:59:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 00:59:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-01 00:59:49,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-01 00:59:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:49,815 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-01 00:59:49,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:59:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-01 00:59:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:59:49,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:49,816 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-01 00:59:49,816 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:49,816 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:49,816 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-01 00:59:49,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:49,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:49,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:49,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:49,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:50,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:50,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:50,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:59:50,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:59:50,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:50,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:50,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:50,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-01 00:59:50,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 00:59:50,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 00:59:50,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:50,995 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-10-01 00:59:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:52,439 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-01 00:59:52,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:59:52,440 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-10-01 00:59:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:52,440 INFO L225 Difference]: With dead ends: 19 [2018-10-01 00:59:52,441 INFO L226 Difference]: Without dead ends: 18 [2018-10-01 00:59:52,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:59:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-01 00:59:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-01 00:59:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 00:59:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-01 00:59:52,446 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-01 00:59:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:52,446 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-01 00:59:52,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 00:59:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-01 00:59:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 00:59:52,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:52,447 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-01 00:59:52,447 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:52,447 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:52,447 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-01 00:59:52,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:52,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:52,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:52,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:52,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:53,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:53,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:53,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:59:53,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:59:53,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:53,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:53,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:53,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-01 00:59:53,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:59:53,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:59:53,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:53,896 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-10-01 00:59:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:55,691 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-01 00:59:55,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:59:55,692 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-10-01 00:59:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:55,693 INFO L225 Difference]: With dead ends: 20 [2018-10-01 00:59:55,693 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:59:55,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 00:59:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:59:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 00:59:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:59:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-01 00:59:55,697 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-01 00:59:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:55,697 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-01 00:59:55,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:59:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-01 00:59:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:59:55,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:55,698 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-01 00:59:55,698 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:55,699 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-01 00:59:55,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:55,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:55,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:55,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:55,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:56,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:56,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:56,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:59:56,227 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:59:56,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:56,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:56,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:56,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-01 00:59:56,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:59:56,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:59:56,796 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:56,796 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-10-01 00:59:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:58,515 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-01 00:59:58,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:59:58,516 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-10-01 00:59:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:58,517 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:59:58,517 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 00:59:58,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:59:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 00:59:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-01 00:59:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 00:59:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-01 00:59:58,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-01 00:59:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:58,522 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-01 00:59:58,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:59:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-01 00:59:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:59:58,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:58,523 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-01 00:59:58,523 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:58,523 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-01 00:59:58,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:58,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:58,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:58,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:58,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:59,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:59,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:59,742 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:59:59,766 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:59:59,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:59,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:00,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:00,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-01 01:00:00,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 01:00:00,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 01:00:00,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:00,470 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-10-01 01:00:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:02,311 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-01 01:00:02,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 01:00:02,312 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-10-01 01:00:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:02,312 INFO L225 Difference]: With dead ends: 22 [2018-10-01 01:00:02,312 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 01:00:02,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 01:00:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 01:00:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 01:00:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 01:00:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-01 01:00:02,316 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-01 01:00:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:02,316 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-01 01:00:02,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 01:00:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-01 01:00:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 01:00:02,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:02,317 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-01 01:00:02,317 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:02,317 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:02,317 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-01 01:00:02,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:02,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:02,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:02,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:02,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:02,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:02,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:00:02,791 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:00:02,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:00:02,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:02,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:03,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:03,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-01 01:00:03,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 01:00:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 01:00:03,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:03,600 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-10-01 01:00:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:05,809 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-01 01:00:05,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 01:00:05,809 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-10-01 01:00:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:05,810 INFO L225 Difference]: With dead ends: 23 [2018-10-01 01:00:05,810 INFO L226 Difference]: Without dead ends: 22 [2018-10-01 01:00:05,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:00:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-01 01:00:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-01 01:00:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:00:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-01 01:00:05,815 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-01 01:00:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:05,815 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-01 01:00:05,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 01:00:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-01 01:00:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:00:05,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:05,816 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-01 01:00:05,816 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:05,816 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-01 01:00:05,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:05,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:05,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:05,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:05,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:06,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:06,227 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 01:00:06,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:06,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:07,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:07,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-01 01:00:07,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 01:00:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 01:00:07,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:07,090 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-10-01 01:00:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:09,495 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-01 01:00:09,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 01:00:09,496 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-10-01 01:00:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:09,497 INFO L225 Difference]: With dead ends: 24 [2018-10-01 01:00:09,497 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:00:09,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:00:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:00:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-01 01:00:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 01:00:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-01 01:00:09,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-01 01:00:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:09,503 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-01 01:00:09,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 01:00:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-01 01:00:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 01:00:09,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:09,504 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-01 01:00:09,504 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:09,504 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-01 01:00:09,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:09,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:09,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:09,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:09,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:10,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:10,102 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 01:00:10,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:00:10,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:00:10,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:10,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:11,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:11,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-01 01:00:11,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 01:00:11,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 01:00:11,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:11,191 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-10-01 01:00:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:14,060 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-01 01:00:14,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 01:00:14,061 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-10-01 01:00:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:14,062 INFO L225 Difference]: With dead ends: 25 [2018-10-01 01:00:14,062 INFO L226 Difference]: Without dead ends: 24 [2018-10-01 01:00:14,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 01:00:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-01 01:00:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-01 01:00:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:00:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-01 01:00:14,066 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-01 01:00:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:14,067 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-01 01:00:14,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 01:00:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-01 01:00:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-01 01:00:14,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:14,068 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-01 01:00:14,068 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:14,068 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:14,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-01 01:00:14,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:14,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:14,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:14,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:14,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:14,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:14,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:00:14,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:00:14,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-01 01:00:14,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:14,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:15,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:15,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-01 01:00:15,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 01:00:15,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 01:00:15,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:15,611 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-10-01 01:00:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:18,740 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-01 01:00:18,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 01:00:18,743 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-10-01 01:00:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:18,744 INFO L225 Difference]: With dead ends: 26 [2018-10-01 01:00:18,744 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 01:00:18,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:00:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 01:00:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 01:00:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 01:00:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-01 01:00:18,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-01 01:00:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:18,748 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-01 01:00:18,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 01:00:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-01 01:00:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 01:00:18,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:18,749 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-01 01:00:18,749 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:18,750 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:18,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-01 01:00:18,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:18,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:18,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:18,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:18,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:19,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:19,833 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 01:00:19,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:00:19,858 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:00:19,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:19,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:20,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:20,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-01 01:00:20,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 01:00:20,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 01:00:20,925 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:20,925 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-10-01 01:00:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:24,498 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-01 01:00:24,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 01:00:24,498 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-10-01 01:00:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:24,499 INFO L225 Difference]: With dead ends: 27 [2018-10-01 01:00:24,499 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 01:00:24,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 01:00:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 01:00:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-01 01:00:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:00:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-01 01:00:24,504 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-01 01:00:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:24,504 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-01 01:00:24,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 01:00:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-01 01:00:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-01 01:00:24,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:24,505 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-01 01:00:24,505 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:24,506 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-01 01:00:24,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:24,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:24,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:24,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:24,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:25,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:25,132 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 01:00:25,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:00:25,162 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-01 01:00:25,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:25,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:26,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:26,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-01 01:00:26,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 01:00:26,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 01:00:26,239 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:26,240 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-10-01 01:00:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:29,552 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-01 01:00:29,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 01:00:29,553 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-10-01 01:00:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:29,553 INFO L225 Difference]: With dead ends: 28 [2018-10-01 01:00:29,553 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:00:29,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 01:00:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:00:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 01:00:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 01:00:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-01 01:00:29,558 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-01 01:00:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:29,558 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-01 01:00:29,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 01:00:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-01 01:00:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 01:00:29,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:29,559 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-01 01:00:29,559 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:29,560 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-01 01:00:29,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:29,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:29,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:29,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:29,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:30,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:30,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:00:30,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:00:30,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 01:00:30,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:30,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:31,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:31,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-01 01:00:31,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 01:00:31,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 01:00:31,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:31,391 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-10-01 01:00:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:35,886 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-01 01:00:35,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 01:00:35,887 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-10-01 01:00:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:35,887 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:00:35,888 INFO L226 Difference]: Without dead ends: 28 [2018-10-01 01:00:35,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 01:00:35,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-01 01:00:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-01 01:00:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:00:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-01 01:00:35,893 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-01 01:00:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:35,893 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-01 01:00:35,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 01:00:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-01 01:00:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-01 01:00:35,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:35,894 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-01 01:00:35,895 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:35,895 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-01 01:00:35,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:35,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:35,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:35,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:35,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:36,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:36,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:00:36,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:36,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:37,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:37,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-01 01:00:37,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 01:00:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 01:00:37,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:37,920 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-10-01 01:00:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:42,894 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-01 01:00:42,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 01:00:42,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-10-01 01:00:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:42,895 INFO L225 Difference]: With dead ends: 30 [2018-10-01 01:00:42,895 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:00:42,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-10-01 01:00:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:00:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 01:00:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 01:00:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-01 01:00:42,901 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-01 01:00:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:42,901 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-01 01:00:42,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 01:00:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-01 01:00:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 01:00:42,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:42,902 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-01 01:00:42,903 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:42,903 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:42,903 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-01 01:00:42,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:42,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:42,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:42,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:42,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:43,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:43,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:00:43,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:00:43,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:00:43,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:43,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:45,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:45,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-01 01:00:45,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 01:00:45,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 01:00:45,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:45,301 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-10-01 01:00:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:51,062 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-01 01:00:51,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 01:00:51,063 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-10-01 01:00:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:51,063 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:00:51,063 INFO L226 Difference]: Without dead ends: 30 [2018-10-01 01:00:51,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 01:00:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-01 01:00:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-01 01:00:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:00:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-01 01:00:51,068 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-01 01:00:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:51,068 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-01 01:00:51,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 01:00:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-01 01:00:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-01 01:00:51,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:51,069 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-01 01:00:51,070 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:51,070 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-01 01:00:51,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:51,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:51,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:51,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:51,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:52,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:52,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:00:52,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:00:52,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-01 01:00:52,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:52,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:54,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:54,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-01 01:00:54,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 01:00:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 01:00:54,170 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:54,170 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-10-01 01:00:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:58,664 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-01 01:00:58,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 01:00:58,664 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-10-01 01:00:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:58,664 INFO L225 Difference]: With dead ends: 32 [2018-10-01 01:00:58,664 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:00:58,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 01:00:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:00:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-01 01:00:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 01:00:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-01 01:00:58,668 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-01 01:00:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:58,669 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-01 01:00:58,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 01:00:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-01 01:00:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 01:00:58,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:58,669 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-01 01:00:58,670 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:58,670 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:58,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-01 01:00:58,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:58,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:58,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:58,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:58,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:59,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:59,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:00:59,510 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:00:59,529 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:00:59,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:59,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:01,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:01,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-01 01:01:01,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 01:01:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 01:01:01,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:01,149 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-10-01 01:01:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:05,901 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-01 01:01:05,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 01:01:05,902 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-10-01 01:01:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:05,903 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:01:05,903 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 01:01:05,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 01:01:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 01:01:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-01 01:01:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:01:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-01 01:01:05,908 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-01 01:01:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:05,909 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-01 01:01:05,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 01:01:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-01 01:01:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-01 01:01:05,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:05,910 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-01 01:01:05,910 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:05,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:05,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-01 01:01:05,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:05,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:05,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:05,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:05,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:06,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:06,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:01:06,906 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:01:06,932 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-01 01:01:06,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:06,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:09,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:09,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-01 01:01:09,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 01:01:09,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 01:01:09,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:09,184 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-10-01 01:01:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:15,696 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-01 01:01:15,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 01:01:15,697 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-10-01 01:01:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:15,698 INFO L225 Difference]: With dead ends: 34 [2018-10-01 01:01:15,698 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:01:15,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 01:01:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:01:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 01:01:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 01:01:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-01 01:01:15,703 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-01 01:01:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:15,703 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-01 01:01:15,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 01:01:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-01 01:01:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 01:01:15,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:15,704 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-01 01:01:15,704 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:15,705 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:15,705 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-01 01:01:15,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:15,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:15,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:15,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:15,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:16,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:16,618 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 01:01:16,633 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:01:16,657 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-01 01:01:16,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:16,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:18,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:18,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-01 01:01:18,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-01 01:01:18,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-01 01:01:18,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:18,552 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-10-01 01:01:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:23,668 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-01 01:01:23,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 01:01:23,669 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-10-01 01:01:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:23,669 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:01:23,669 INFO L226 Difference]: Without dead ends: 34 [2018-10-01 01:01:23,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time [2018-10-01 01:01:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-01 01:01:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-01 01:01:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:01:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-01 01:01:23,674 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-01 01:01:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:23,674 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-01 01:01:23,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-01 01:01:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-01 01:01:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-01 01:01:23,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:23,675 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-01 01:01:23,676 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:23,676 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-01 01:01:23,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:23,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:23,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:23,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:23,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:24,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:24,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:01:24,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:01:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:24,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:26,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:26,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-01 01:01:26,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 01:01:26,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 01:01:26,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:26,739 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-10-01 01:01:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:33,930 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-01 01:01:33,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 01:01:33,931 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-10-01 01:01:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:33,932 INFO L225 Difference]: With dead ends: 36 [2018-10-01 01:01:33,932 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:01:33,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 01:01:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:01:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 01:01:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 01:01:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-01 01:01:33,936 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-01 01:01:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:33,937 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-01 01:01:33,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 01:01:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-01 01:01:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 01:01:33,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:33,937 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-01 01:01:33,938 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:33,938 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-01 01:01:33,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:33,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:33,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:33,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:01:33,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:35,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:35,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:01:35,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:01:35,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:01:35,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:35,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:37,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:37,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-01 01:01:37,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-01 01:01:37,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-01 01:01:37,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:37,018 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-10-01 01:01:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:42,844 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-01 01:01:42,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 01:01:42,844 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-10-01 01:01:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:42,845 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:01:42,845 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 01:01:42,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 01:01:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 01:01:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-01 01:01:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:01:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-01 01:01:42,850 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-01 01:01:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:42,850 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-01 01:01:42,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-01 01:01:42,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-01 01:01:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-01 01:01:42,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:42,851 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-01 01:01:42,851 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:42,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-01 01:01:42,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:42,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:42,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:42,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:42,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:44,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:44,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:01:44,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:01:44,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-01 01:01:44,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:44,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:46,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:46,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-01 01:01:46,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 01:01:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 01:01:46,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:46,433 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-10-01 01:01:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:55,730 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-01 01:01:55,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 01:01:55,730 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-10-01 01:01:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:55,731 INFO L225 Difference]: With dead ends: 38 [2018-10-01 01:01:55,731 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:01:55,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time [2018-10-01 01:01:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:01:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 01:01:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 01:01:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-01 01:01:55,735 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-01 01:01:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:55,735 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-01 01:01:55,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 01:01:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-01 01:01:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 01:01:55,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:55,736 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-01 01:01:55,736 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:55,736 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-01 01:01:55,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:55,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:55,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:55,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:55,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:57,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:57,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:01:57,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:01:57,221 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:01:57,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:57,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:59,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:59,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-01 01:01:59,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 01:01:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 01:01:59,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:59,867 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-10-01 01:02:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:08,103 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-01 01:02:08,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 01:02:08,104 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-10-01 01:02:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:08,104 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:02:08,104 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 01:02:08,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time [2018-10-01 01:02:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 01:02:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-01 01:02:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:02:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-01 01:02:08,108 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-01 01:02:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:08,108 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-01 01:02:08,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 01:02:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-01 01:02:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-01 01:02:08,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:08,109 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-01 01:02:08,109 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:08,109 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:08,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-01 01:02:08,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:08,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:08,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:08,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:08,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:09,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:09,474 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 01:02:09,481 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:02:09,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-01 01:02:09,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:09,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:11,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:11,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-01 01:02:11,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 01:02:11,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 01:02:11,981 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:11,981 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-10-01 01:02:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:19,767 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-01 01:02:19,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 01:02:19,768 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-10-01 01:02:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:19,769 INFO L225 Difference]: With dead ends: 40 [2018-10-01 01:02:19,769 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:02:19,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time [2018-10-01 01:02:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:02:19,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-01 01:02:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 01:02:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-01 01:02:19,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-01 01:02:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:19,774 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-01 01:02:19,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 01:02:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-01 01:02:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 01:02:19,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:19,775 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-01 01:02:19,775 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:19,775 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:19,775 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-01 01:02:19,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:19,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:19,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:19,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:19,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:21,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:21,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:02:21,129 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:02:21,157 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-01 01:02:21,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:21,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:23,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:23,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-01 01:02:23,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-01 01:02:23,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-01 01:02:23,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:23,590 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-10-01 01:02:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:31,342 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-01 01:02:31,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 01:02:31,343 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-10-01 01:02:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:31,344 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:02:31,344 INFO L226 Difference]: Without dead ends: 40 [2018-10-01 01:02:31,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time [2018-10-01 01:02:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-01 01:02:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-01 01:02:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-01 01:02:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-01 01:02:31,348 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-01 01:02:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:31,349 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-01 01:02:31,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-01 01:02:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-01 01:02:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-01 01:02:31,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:31,349 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-01 01:02:31,350 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:31,350 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-01 01:02:31,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:31,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:31,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:31,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:31,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:32,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:32,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:02:32,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:02:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:32,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:35,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:35,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-01 01:02:35,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 01:02:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 01:02:35,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:35,196 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-10-01 01:02:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:43,033 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-01 01:02:43,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 01:02:43,034 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-10-01 01:02:43,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:43,035 INFO L225 Difference]: With dead ends: 42 [2018-10-01 01:02:43,035 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:02:43,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time [2018-10-01 01:02:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:02:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 01:02:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 01:02:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-01 01:02:43,038 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-01 01:02:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:43,038 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-01 01:02:43,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 01:02:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-01 01:02:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 01:02:43,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:43,039 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-01 01:02:43,039 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:43,039 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-01 01:02:43,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:43,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:43,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:43,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:02:43,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:44,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:44,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:44,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:02:44,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:02:44,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:44,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:47,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:47,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-01 01:02:47,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 01:02:47,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 01:02:47,829 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:47,829 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-10-01 01:02:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:56,407 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-01 01:02:56,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 01:02:56,407 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-10-01 01:02:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:56,407 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:02:56,408 INFO L226 Difference]: Without dead ends: 42 [2018-10-01 01:02:56,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time [2018-10-01 01:02:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-01 01:02:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-01 01:02:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 01:02:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-01 01:02:56,410 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-01 01:02:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:56,411 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-01 01:02:56,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 01:02:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-01 01:02:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-01 01:02:56,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:56,411 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-01 01:02:56,412 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:56,412 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-01 01:02:56,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:56,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:56,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:56,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:56,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:59,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:59,212 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 01:02:59,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:02:59,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-01 01:02:59,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:59,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:02,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:02,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-01 01:03:02,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 01:03:02,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 01:03:02,225 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:02,225 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-10-01 01:03:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:12,213 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-01 01:03:12,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 01:03:12,213 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-10-01 01:03:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:12,214 INFO L225 Difference]: With dead ends: 44 [2018-10-01 01:03:12,214 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:03:12,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time [2018-10-01 01:03:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:03:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 01:03:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 01:03:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-01 01:03:12,219 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-01 01:03:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:12,220 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-01 01:03:12,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 01:03:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-01 01:03:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 01:03:12,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:12,220 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-01 01:03:12,220 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:12,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-01 01:03:12,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:12,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:12,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:12,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:12,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:13,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:13,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:03:13,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:03:13,666 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:03:13,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:13,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:16,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:16,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-01 01:03:16,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 01:03:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 01:03:16,626 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:16,626 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-10-01 01:03:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:28,744 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-01 01:03:28,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 01:03:28,745 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-10-01 01:03:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:28,746 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:03:28,746 INFO L226 Difference]: Without dead ends: 44 [2018-10-01 01:03:28,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time [2018-10-01 01:03:28,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-01 01:03:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-01 01:03:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-01 01:03:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-01 01:03:28,750 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-01 01:03:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:28,751 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-01 01:03:28,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 01:03:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-01 01:03:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-01 01:03:28,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:28,752 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-01 01:03:28,752 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:28,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:28,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-01 01:03:28,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:28,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:28,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:28,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:28,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:30,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:30,278 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 01:03:30,285 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:03:30,319 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-01 01:03:30,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:30,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:33,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:33,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-01 01:03:33,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 01:03:33,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 01:03:33,604 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:33,604 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-10-01 01:03:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:44,181 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-01 01:03:44,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 01:03:44,181 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-10-01 01:03:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:44,182 INFO L225 Difference]: With dead ends: 46 [2018-10-01 01:03:44,182 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:03:44,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time [2018-10-01 01:03:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:03:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 01:03:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 01:03:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-01 01:03:44,186 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-01 01:03:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:44,187 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-01 01:03:44,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 01:03:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-01 01:03:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 01:03:44,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:44,187 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-01 01:03:44,187 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:44,188 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:44,188 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-01 01:03:44,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:44,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:44,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:44,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:44,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:45,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:45,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:03:45,704 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:03:45,737 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-01 01:03:45,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:45,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:49,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:49,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-01 01:03:49,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-01 01:03:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-01 01:03:49,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:49,181 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-10-01 01:03:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:59,196 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-01 01:03:59,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 01:03:59,196 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-10-01 01:03:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:59,197 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:03:59,197 INFO L226 Difference]: Without dead ends: 46 [2018-10-01 01:03:59,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time [2018-10-01 01:03:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-01 01:03:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-01 01:03:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-01 01:03:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-01 01:03:59,202 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-01 01:03:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:59,203 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-01 01:03:59,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-01 01:03:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-01 01:03:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-01 01:03:59,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:59,203 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-01 01:03:59,204 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:59,204 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:59,204 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-01 01:03:59,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:59,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:59,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:59,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:00,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:00,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:04:00,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:04:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:00,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:04,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:04,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-01 01:04:04,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 01:04:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 01:04:04,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:04,516 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-10-01 01:04:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:19,235 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-01 01:04:19,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 01:04:19,236 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-10-01 01:04:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:19,237 INFO L225 Difference]: With dead ends: 48 [2018-10-01 01:04:19,237 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:04:19,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time [2018-10-01 01:04:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:04:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-01 01:04:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-01 01:04:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-01 01:04:19,241 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-01 01:04:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:19,241 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-01 01:04:19,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 01:04:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-01 01:04:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 01:04:19,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:19,242 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-01 01:04:19,242 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:19,242 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-01 01:04:19,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:19,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:19,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:19,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:04:19,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:20,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:20,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:04:20,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:04:20,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:04:20,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:20,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:24,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:24,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-01 01:04:24,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-01 01:04:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-01 01:04:24,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:24,494 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-10-01 01:04:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:34,631 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-01 01:04:34,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 01:04:34,632 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-10-01 01:04:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:34,633 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:04:34,633 INFO L226 Difference]: Without dead ends: 48 [2018-10-01 01:04:34,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time [2018-10-01 01:04:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-01 01:04:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-01 01:04:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-01 01:04:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-01 01:04:34,636 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-01 01:04:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:34,636 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-01 01:04:34,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-01 01:04:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-01 01:04:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-01 01:04:34,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:34,637 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-01 01:04:34,637 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:34,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-01 01:04:34,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:34,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:34,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:34,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:04:34,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:36,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:36,367 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 01:04:36,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:04:36,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-01 01:04:36,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:36,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:40,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:40,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-01 01:04:40,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-01 01:04:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-01 01:04:40,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:40,107 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-10-01 01:04:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:53,498 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-01 01:04:53,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 01:04:53,499 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-10-01 01:04:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:53,499 INFO L225 Difference]: With dead ends: 50 [2018-10-01 01:04:53,500 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:04:53,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s Time [2018-10-01 01:04:53,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:04:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-01 01:04:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 01:04:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-01 01:04:53,504 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-01 01:04:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:53,504 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-01 01:04:53,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-01 01:04:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-01 01:04:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 01:04:53,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:53,505 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-01 01:04:53,505 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:53,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-01 01:04:53,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:53,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:53,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:53,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:04:53,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:55,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:55,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:04:55,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:04:55,548 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:04:55,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:55,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:59,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:59,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-01 01:04:59,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-01 01:04:59,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-01 01:04:59,519 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:59,519 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-10-01 01:05:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:14,302 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-01 01:05:14,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 01:05:14,302 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-10-01 01:05:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:14,303 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:05:14,303 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 01:05:14,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s Time [2018-10-01 01:05:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 01:05:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-01 01:05:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-01 01:05:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-01 01:05:14,307 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-01 01:05:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:14,307 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-01 01:05:14,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-01 01:05:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-01 01:05:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-01 01:05:14,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:14,308 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-01 01:05:14,308 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:14,309 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-01 01:05:14,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:14,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:14,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:14,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:14,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:16,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:16,541 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 01:05:16,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:05:16,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-01 01:05:16,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:05:16,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:20,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:20,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-01 01:05:20,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-01 01:05:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-01 01:05:20,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:20,813 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-10-01 01:05:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:33,627 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-01 01:05:33,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 01:05:33,627 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-10-01 01:05:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:33,628 INFO L225 Difference]: With dead ends: 52 [2018-10-01 01:05:33,628 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:05:33,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s Time [2018-10-01 01:05:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:05:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-01 01:05:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 01:05:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-01 01:05:33,634 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-01 01:05:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:33,634 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-01 01:05:33,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-01 01:05:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-01 01:05:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 01:05:33,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:33,635 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-01 01:05:33,635 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:33,635 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-01 01:05:33,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:33,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:33,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:33,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:33,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:35,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:35,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:05:35,739 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:05:35,779 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-01 01:05:35,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:05:35,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:39,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:39,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-01 01:05:39,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-01 01:05:39,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-01 01:05:39,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:39,969 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-10-01 01:05:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:49,739 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-01 01:05:49,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 01:05:49,739 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-10-01 01:05:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:49,740 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:05:49,740 INFO L226 Difference]: Without dead ends: 52 [2018-10-01 01:05:49,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s Time [2018-10-01 01:05:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-01 01:05:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-01 01:05:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-01 01:05:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-01 01:05:49,745 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-01 01:05:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:49,746 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-01 01:05:49,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-01 01:05:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-01 01:05:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-01 01:05:49,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:49,746 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-01 01:05:49,747 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:49,747 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-01 01:05:49,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:49,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:49,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:49,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:49,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:52,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:52,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:05:52,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:05:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:52,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:56,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:56,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-01 01:05:56,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-01 01:05:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-01 01:05:56,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:56,686 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-10-01 01:06:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:07,302 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-01 01:06:07,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 01:06:07,303 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-10-01 01:06:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:07,303 INFO L225 Difference]: With dead ends: 54 [2018-10-01 01:06:07,304 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:06:07,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s Time [2018-10-01 01:06:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:06:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 01:06:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 01:06:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-01 01:06:07,308 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-01 01:06:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:07,309 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-01 01:06:07,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-01 01:06:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-01 01:06:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 01:06:07,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:07,309 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-01 01:06:07,310 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:07,310 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:07,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-01 01:06:07,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:07,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:07,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:07,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:06:07,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:09,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:09,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:06:09,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:06:10,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:06:10,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:10,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:14,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:14,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-01 01:06:14,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-01 01:06:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-01 01:06:14,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:14,802 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-10-01 01:06:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:26,029 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-01 01:06:26,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 01:06:26,029 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-10-01 01:06:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:26,030 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:06:26,031 INFO L226 Difference]: Without dead ends: 54 [2018-10-01 01:06:26,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s Time [2018-10-01 01:06:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-01 01:06:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-01 01:06:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-01 01:06:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-01 01:06:26,035 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-01 01:06:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:26,036 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-01 01:06:26,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-01 01:06:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-01 01:06:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-01 01:06:26,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:26,036 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-01 01:06:26,037 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:26,037 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-01 01:06:26,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:26,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:26,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:26,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:26,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:28,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:28,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:06:28,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:06:28,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-01 01:06:28,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:28,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:33,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:33,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-01 01:06:33,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-01 01:06:33,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-01 01:06:33,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:33,470 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-10-01 01:06:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:45,087 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-01 01:06:45,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 01:06:45,088 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-10-01 01:06:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:45,088 INFO L225 Difference]: With dead ends: 56 [2018-10-01 01:06:45,089 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:06:45,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s Time [2018-10-01 01:06:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:06:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-01 01:06:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-01 01:06:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-01 01:06:45,092 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-01 01:06:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:45,093 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-01 01:06:45,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-01 01:06:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-01 01:06:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 01:06:45,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:45,093 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-01 01:06:45,094 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:45,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:45,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-01 01:06:45,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:45,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:45,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:45,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:45,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:47,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:47,439 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 01:06:47,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:06:47,485 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:06:47,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:47,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:52,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:52,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-01 01:06:52,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-01 01:06:52,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-01 01:06:52,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:52,461 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-10-01 01:07:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:05,695 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-01 01:07:05,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 01:07:05,696 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-10-01 01:07:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:05,697 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:07:05,697 INFO L226 Difference]: Without dead ends: 56 [2018-10-01 01:07:05,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s Time [2018-10-01 01:07:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-01 01:07:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-01 01:07:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-01 01:07:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-01 01:07:05,700 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-01 01:07:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:05,700 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-01 01:07:05,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-01 01:07:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-01 01:07:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-01 01:07:05,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:05,701 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-01 01:07:05,701 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:05,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-01 01:07:05,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:05,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:05,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:05,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:07:05,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:08,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:08,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:07:08,127 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:07:08,175 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-01 01:07:08,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:07:08,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:07:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:13,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:07:13,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-01 01:07:13,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-01 01:07:13,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-01 01:07:13,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:07:13,189 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-10-01 01:07:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:27,959 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-01 01:07:27,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 01:07:27,959 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-10-01 01:07:27,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:27,960 INFO L225 Difference]: With dead ends: 58 [2018-10-01 01:07:27,960 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:07:27,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s Time [2018-10-01 01:07:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:07:27,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-01 01:07:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-01 01:07:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-01 01:07:27,963 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-01 01:07:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:27,964 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-01 01:07:27,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-01 01:07:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-01 01:07:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 01:07:27,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:27,964 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-01 01:07:27,965 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:27,965 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:27,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-01 01:07:27,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:27,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:27,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:27,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:07:27,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:30,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:30,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:07:30,345 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:07:30,391 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-01 01:07:30,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:07:30,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:07:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:35,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:07:35,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-01 01:07:35,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-01 01:07:35,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-01 01:07:35,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:07:35,841 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-10-01 01:07:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:54,367 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-01 01:07:54,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 01:07:54,368 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-10-01 01:07:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:54,368 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:07:54,369 INFO L226 Difference]: Without dead ends: 58 [2018-10-01 01:07:54,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s Time [2018-10-01 01:07:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-01 01:07:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-01 01:07:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-01 01:07:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-01 01:07:54,373 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-01 01:07:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:54,373 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-01 01:07:54,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-01 01:07:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-01 01:07:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-01 01:07:54,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:54,373 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-01 01:07:54,374 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:54,374 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:54,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-01 01:07:54,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:54,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:54,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:54,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:07:54,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:56,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:56,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:07:56,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:07:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:56,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:02,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:02,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-01 01:08:02,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-01 01:08:02,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-01 01:08:02,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:02,430 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-10-01 01:08:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:24,823 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-01 01:08:24,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 01:08:24,823 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-10-01 01:08:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:24,824 INFO L225 Difference]: With dead ends: 60 [2018-10-01 01:08:24,824 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:08:24,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s Time [2018-10-01 01:08:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:08:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-01 01:08:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 01:08:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-01 01:08:24,828 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-01 01:08:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:24,828 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-01 01:08:24,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-01 01:08:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-01 01:08:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 01:08:24,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:24,829 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-01 01:08:24,829 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:24,829 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-01 01:08:24,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:24,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:24,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:24,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:28,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:28,085 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 01:08:28,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:28,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:28,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:28,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:33,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:33,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-01 01:08:33,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-01 01:08:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-01 01:08:33,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:33,814 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-10-01 01:08:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:59,399 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-01 01:08:59,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 01:08:59,399 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-10-01 01:08:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:59,400 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:08:59,400 INFO L226 Difference]: Without dead ends: 60 [2018-10-01 01:08:59,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8s Time [2018-10-01 01:08:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-01 01:08:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-01 01:08:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-01 01:08:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-01 01:08:59,405 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-01 01:08:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:59,405 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-01 01:08:59,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-01 01:08:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-01 01:08:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-01 01:08:59,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:59,406 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-01 01:08:59,406 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:59,407 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:59,407 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-01 01:08:59,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:59,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:59,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:59,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:59,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:02,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:02,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:02,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:02,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-01 01:09:02,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:02,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:08,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:08,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-01 01:09:08,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-01 01:09:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-01 01:09:08,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:08,197 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-10-01 01:09:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:24,432 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-01 01:09:24,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 01:09:24,433 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-10-01 01:09:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:24,434 INFO L225 Difference]: With dead ends: 62 [2018-10-01 01:09:24,434 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:09:24,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6s Time [2018-10-01 01:09:24,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:09:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-01 01:09:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-01 01:09:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-01 01:09:24,439 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-01 01:09:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:24,439 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-01 01:09:24,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-01 01:09:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-01 01:09:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 01:09:24,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:24,440 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-01 01:09:24,440 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:24,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-01 01:09:24,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:24,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:24,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:24,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:24,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:27,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:27,267 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 01:09:27,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:09:27,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:09:27,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:27,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:33,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:33,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-01 01:09:33,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-01 01:09:33,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-01 01:09:33,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:33,700 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 120 states. [2018-10-01 01:09:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:55,621 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-01 01:09:55,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 01:09:55,622 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 60 [2018-10-01 01:09:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:55,623 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:09:55,623 INFO L226 Difference]: Without dead ends: 62 [2018-10-01 01:09:55,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s Time [2018-10-01 01:09:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-01 01:09:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-01 01:09:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-01 01:09:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-01 01:09:55,628 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-01 01:09:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:55,628 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-01 01:09:55,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-01 01:09:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-01 01:09:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-01 01:09:55,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:55,628 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-10-01 01:09:55,628 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:55,629 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:55,629 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-10-01 01:09:55,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:55,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:55,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:55,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:55,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:58,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:58,614 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 01:09:58,622 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:09:58,670 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-01 01:09:58,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:58,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:04,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:04,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-01 01:10:04,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-01 01:10:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-01 01:10:04,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:04,979 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 122 states. [2018-10-01 01:10:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:33,168 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-01 01:10:33,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 01:10:33,169 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 61 [2018-10-01 01:10:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:33,170 INFO L225 Difference]: With dead ends: 64 [2018-10-01 01:10:33,170 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:10:33,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1s Time [2018-10-01 01:10:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:10:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-01 01:10:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-01 01:10:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-01 01:10:33,174 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-01 01:10:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:33,175 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-01 01:10:33,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-01 01:10:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-01 01:10:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 01:10:33,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:33,175 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-10-01 01:10:33,175 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:33,175 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-10-01 01:10:33,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:33,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:33,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:33,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:33,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:37,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:37,591 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 01:10:37,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:37,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-01 01:10:37,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:37,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:44,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:44,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-01 01:10:44,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-01 01:10:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-01 01:10:44,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:44,186 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 124 states. [2018-10-01 01:11:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:03,906 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-01 01:11:03,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 01:11:03,906 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 62 [2018-10-01 01:11:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:03,907 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:11:03,907 INFO L226 Difference]: Without dead ends: 64 [2018-10-01 01:11:03,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8s Time [2018-10-01 01:11:03,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-01 01:11:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-01 01:11:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-01 01:11:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-01 01:11:03,912 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-01 01:11:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:03,912 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-01 01:11:03,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-01 01:11:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-01 01:11:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-01 01:11:03,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:03,913 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-10-01 01:11:03,913 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:03,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-10-01 01:11:03,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:03,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:03,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:03,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:03,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:07,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:07,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:11:07,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:07,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:14,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:14,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-01 01:11:14,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-01 01:11:14,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-01 01:11:14,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:14,702 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 126 states. [2018-10-01 01:11:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:41,749 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-01 01:11:41,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-01 01:11:41,750 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 63 [2018-10-01 01:11:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:41,751 INFO L225 Difference]: With dead ends: 66 [2018-10-01 01:11:41,751 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:11:41,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6s Time [2018-10-01 01:11:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:11:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-01 01:11:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-01 01:11:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-01 01:11:41,755 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-01 01:11:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:41,755 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-01 01:11:41,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-01 01:11:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-01 01:11:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 01:11:41,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:41,756 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-10-01 01:11:41,756 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:41,756 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-10-01 01:11:41,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:41,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:41,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:41,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:41,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:44,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:44,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:11:44,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:45,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:45,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:45,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:51,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:51,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-01 01:11:51,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-01 01:11:51,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-01 01:11:51,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:51,934 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 128 states. [2018-10-01 01:12:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:12,349 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-01 01:12:12,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 01:12:12,349 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 64 [2018-10-01 01:12:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:12,350 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:12:12,350 INFO L226 Difference]: Without dead ends: 66 [2018-10-01 01:12:12,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s Time [2018-10-01 01:12:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-01 01:12:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-01 01:12:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-01 01:12:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-01 01:12:12,355 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-01 01:12:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:12,356 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-01 01:12:12,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-01 01:12:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-01 01:12:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-01 01:12:12,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:12,356 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-10-01 01:12:12,356 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:12,357 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-10-01 01:12:12,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:12,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:12,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:12,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:12,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:15,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:15,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:12:15,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:15,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-01 01:12:15,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:15,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:22,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:22,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-01 01:12:22,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-01 01:12:22,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-01 01:12:22,876 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:22,877 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 130 states. Received shutdown request... [2018-10-01 01:12:34,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 01:12:34,563 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 01:12:34,568 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 01:12:34,569 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 01:12:34 BoogieIcfgContainer [2018-10-01 01:12:34,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 01:12:34,570 INFO L168 Benchmark]: Toolchain (without parser) took 783126.37 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -513.3 MB). Free memory was 1.5 GB in the beginning and 953.9 MB in the end (delta: 501.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:12:34,571 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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 01:12:34,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.03 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 01:12:34,572 INFO L168 Benchmark]: Boogie Preprocessor took 23.25 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 01:12:34,573 INFO L168 Benchmark]: RCFGBuilder took 234.05 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 01:12:34,574 INFO L168 Benchmark]: TraceAbstraction took 782819.62 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -513.3 MB). Free memory was 1.4 GB in the beginning and 953.9 MB in the end (delta: 480.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:12:34,577 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.03 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 23.25 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 234.05 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 782819.62 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -513.3 MB). Free memory was 1.4 GB in the beginning and 953.9 MB in the end (delta: 480.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was constructing difference of abstraction (66states) and FLOYD_HOARE automaton (currently 29 states, 130 states before enhancement), while ReachableStatesComputation was computing reachable states (27 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 782.7s OverallTime, 64 OverallIterations, 63 TraceHistogramMax, 524.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 128 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 133156 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 175.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4159 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 249.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 63 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 253.0s InterpolantComputationTime, 4286 NumberOfCodeBlocks, 4286 NumberOfCodeBlocksAsserted, 665 NumberOfCheckSat, 4159 ConstructedInterpolants, 0 QuantifiedInterpolants, 2351717 SizeOfPredicates, 0 NumberOfNonLiveVariables, 8505 ConjunctsInSsa, 8316 ConjunctsInUnsatCore, 127 InterpolantComputations, 1 PerfectInterpolantSequences, 0/87360 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_01-12-34-587.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_01-12-34-587.csv Completed graceful shutdown