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/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:34:22,071 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:34:22,074 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:34:22,094 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:34:22,094 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:34:22,095 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:34:22,097 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:34:22,101 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:34:22,104 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:34:22,107 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:34:22,110 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 14:34:22,155 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 [2018-10-04 14:34:22,170 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:34:22,170 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:34:22,171 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:34:22,171 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:34:22,172 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:34:22,172 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:34:22,172 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:34:22,172 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:34:22,173 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:34:22,173 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:34:22,173 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:34:22,173 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:34:22,173 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:34:22,174 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:34:22,174 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:34:22,174 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:34:22,174 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:34:22,174 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:34:22,175 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:34:22,175 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:34:22,175 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:34:22,175 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:34:22,175 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:34:22,176 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:34:22,176 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:34:22,176 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:34:22,176 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:34:22,176 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:34:22,177 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:34:22,177 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:34:22,177 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:34:22,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:34:22,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:34:22,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:34:22,255 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:34:22,256 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:34:22,257 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-10-04 14:34:22,257 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-10-04 14:34:22,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:34:22,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:34:22,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:34:22,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:34:22,316 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:34:22,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,355 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 14:34:22,356 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 14:34:22,356 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 14:34:22,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:34:22,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:34:22,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:34:22,359 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:34:22,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/1) ... [2018-10-04 14:34:22,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:34:22,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:34:22,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:34:22,381 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:34:22,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (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 [2018-10-04 14:34:22,452 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 14:34:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 14:34:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 14:34:22,645 INFO L338 CfgBuilder]: Using library mode [2018-10-04 14:34:22,646 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:34:22 BoogieIcfgContainer [2018-10-04 14:34:22,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:34:22,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:34:22,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:34:22,650 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:34:22,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:34:22" (1/2) ... [2018-10-04 14:34:22,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4890fccb and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:34:22, skipping insertion in model container [2018-10-04 14:34:22,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:34:22" (2/2) ... [2018-10-04 14:34:22,654 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-10-04 14:34:22,664 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:34:22,671 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:34:22,718 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:34:22,718 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:34:22,719 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:34:22,719 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:34:22,719 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:34:22,719 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:34:22,719 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:34:22,719 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:34:22,719 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:34:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 14:34:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-04 14:34:22,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:22,741 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-04 14:34:22,743 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:22,750 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:22,750 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-10-04 14:34:22,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:22,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:22,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:22,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:22,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:22,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:34:22,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 14:34:22,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:34:22,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:34:22,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:22,921 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 14:34:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:23,013 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 14:34:23,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:34:23,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-04 14:34:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:23,041 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:34:23,042 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 14:34:23,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:34:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 14:34:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 14:34:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:34:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-10-04 14:34:23,106 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-10-04 14:34:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:23,106 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-10-04 14:34:23,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:34:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-10-04 14:34:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 14:34:23,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:23,107 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 14:34:23,107 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:23,107 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-10-04 14:34:23,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:23,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:23,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:23,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:23,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,149 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:34:23,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 14:34:23,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:34:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:34:23,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:23,153 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-10-04 14:34:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:23,198 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-10-04 14:34:23,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:34:23,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-04 14:34:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:23,199 INFO L225 Difference]: With dead ends: 12 [2018-10-04 14:34:23,199 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 14:34:23,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:34:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 14:34:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 14:34:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 14:34:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 14:34:23,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-04 14:34:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:23,208 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 14:34:23,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:34:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 14:34:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 14:34:23,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:23,209 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 14:34:23,210 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:23,212 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-10-04 14:34:23,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:23,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:23,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:23,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:23,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:23,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:23,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:23,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:23,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 14:34:23,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:34:23,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:34:23,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:23,442 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-04 14:34:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:23,510 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-10-04 14:34:23,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:34:23,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-04 14:34:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:23,511 INFO L225 Difference]: With dead ends: 14 [2018-10-04 14:34:23,511 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 14:34:23,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 2 [2018-10-04 14:34:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 14:34:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 14:34:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 14:34:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-04 14:34:23,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-10-04 14:34:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:23,515 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-04 14:34:23,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:34:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-04 14:34:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:34:23,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:23,517 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-10-04 14:34:23,517 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:23,517 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-10-04 14:34:23,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:23,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:23,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:23,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:23,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:23,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:23,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:23,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:23,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 14:34:23,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:34:23,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:34:23,688 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:23,688 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-10-04 14:34:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:23,711 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-10-04 14:34:23,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:34:23,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 14:34:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:23,713 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:34:23,713 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:34:23,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-04 14:34:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:34:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:34:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:34:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-10-04 14:34:23,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-10-04 14:34:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:23,717 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-10-04 14:34:23,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:34:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-10-04 14:34:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:34:23,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:23,718 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-10-04 14:34:23,718 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:23,718 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-10-04 14:34:23,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:23,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:23,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:23,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:23,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:23,781 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 [2018-10-04 14:34:23,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:23,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:23,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:23,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:23,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 14:34:23,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:34:23,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:34:23,884 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:23,884 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-10-04 14:34:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:24,012 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 14:34:24,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:34:24,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 14:34:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:24,014 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:34:24,014 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:34:24,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 14:34:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:34:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:34:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:34:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-04 14:34:24,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-04 14:34:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:24,018 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-04 14:34:24,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:34:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-04 14:34:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 14:34:24,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:24,019 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-10-04 14:34:24,019 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:24,020 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-10-04 14:34:24,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:24,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:24,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:24,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:24,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:24,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:24,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:24,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:24,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:24,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:24,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:24,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:24,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:34:24,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:34:24,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:34:24,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:24,296 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-10-04 14:34:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:24,320 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-10-04 14:34:24,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:34:24,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-04 14:34:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:24,322 INFO L225 Difference]: With dead ends: 18 [2018-10-04 14:34:24,322 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 14:34:24,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 14:34:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 14:34:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 14:34:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 14:34:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 14:34:24,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-04 14:34:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:24,327 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 14:34:24,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:34:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 14:34:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 14:34:24,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:24,328 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-10-04 14:34:24,328 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:24,329 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-10-04 14:34:24,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:24,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:24,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:24,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:24,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:24,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:24,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:24,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:24,467 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 14:34:24,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:24,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:24,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:24,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:34:24,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:34:24,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:34:24,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:24,610 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-10-04 14:34:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:24,644 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-10-04 14:34:24,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:34:24,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-04 14:34:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:24,645 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:34:24,646 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 14:34:24,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 14:34:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 14:34:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 14:34:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 14:34:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 14:34:24,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-10-04 14:34:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:24,650 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 14:34:24,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:34:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 14:34:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:34:24,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:24,651 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-10-04 14:34:24,652 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:24,652 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-10-04 14:34:24,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:24,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:24,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:24,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:24,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:24,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:24,742 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 [2018-10-04 14:34:24,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:24,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 14:34:24,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:24,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:24,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:24,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 14:34:24,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:34:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:34:24,921 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:24,921 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-10-04 14:34:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:25,566 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-04 14:34:25,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:34:25,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-04 14:34:25,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:25,567 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:34:25,567 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:34:25,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 10 [2018-10-04 14:34:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:34:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:34:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:34:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-04 14:34:25,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-04 14:34:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:25,572 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-04 14:34:25,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:34:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-04 14:34:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 14:34:25,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:25,573 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-10-04 14:34:25,573 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:25,573 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:25,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-10-04 14:34:25,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:25,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:25,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:25,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:25,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:25,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:25,672 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 [2018-10-04 14:34:25,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:25,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:25,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:25,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:25,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:25,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:34:25,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:34:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:34:25,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:25,804 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-10-04 14:34:25,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:25,858 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-04 14:34:25,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:34:25,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-10-04 14:34:25,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:25,859 INFO L225 Difference]: With dead ends: 24 [2018-10-04 14:34:25,859 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 14:34:25,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 14:34:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 14:34:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 14:34:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 14:34:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 14:34:25,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-04 14:34:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:25,864 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 14:34:25,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:34:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 14:34:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 14:34:25,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:25,865 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-10-04 14:34:25,865 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:25,866 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:25,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-10-04 14:34:25,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:25,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:25,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:25,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:25,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:25,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:25,966 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 [2018-10-04 14:34:25,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:25,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:25,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:25,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:26,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:26,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:34:26,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:34:26,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:34:26,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:26,077 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-04 14:34:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:26,153 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-04 14:34:26,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:34:26,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-04 14:34:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:26,155 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:34:26,155 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 14:34:26,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:34:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 14:34:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 14:34:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 14:34:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-04 14:34:26,160 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-10-04 14:34:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:26,160 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-04 14:34:26,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:34:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-04 14:34:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:34:26,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:26,162 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-10-04 14:34:26,162 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:26,162 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:26,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-10-04 14:34:26,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:26,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:26,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:26,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:26,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:26,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:26,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:26,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:26,292 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:34:26,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:26,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:26,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:26,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:34:26,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:34:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:34:26,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:26,368 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-10-04 14:34:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:26,405 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-10-04 14:34:26,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:34:26,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-04 14:34:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:26,406 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:34:26,407 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:34:26,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:34:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:34:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 14:34:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:34:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-04 14:34:26,413 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-10-04 14:34:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:26,413 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-04 14:34:26,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:34:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-04 14:34:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:34:26,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:26,414 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-10-04 14:34:26,414 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:26,415 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:26,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-10-04 14:34:26,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:26,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:26,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:26,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:26,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:26,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:26,539 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 [2018-10-04 14:34:26,549 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:26,567 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:34:26,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:26,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:26,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:26,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:34:26,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:34:26,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:34:26,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:26,782 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-10-04 14:34:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:26,881 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-04 14:34:26,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:34:26,882 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-10-04 14:34:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:26,882 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:34:26,883 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:34:26,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 7 [2018-10-04 14:34:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:34:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:34:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:34:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 14:34:26,890 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-10-04 14:34:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:26,890 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 14:34:26,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:34:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 14:34:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 14:34:26,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:26,891 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-10-04 14:34:26,891 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:26,892 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:26,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-10-04 14:34:26,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:26,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:26,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:26,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:26,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:26,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:26,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:27,006 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:27,019 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 14:34:27,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:27,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:27,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:27,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 14:34:27,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:34:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:34:27,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:27,181 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-10-04 14:34:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:27,545 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-10-04 14:34:27,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:34:27,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-10-04 14:34:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:27,546 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:34:27,547 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 14:34:27,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 16 [2018-10-04 14:34:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 14:34:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 14:34:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 14:34:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 14:34:27,552 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-04 14:34:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:27,553 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 14:34:27,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:34:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 14:34:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:34:27,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:27,554 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-10-04 14:34:27,554 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:27,554 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-10-04 14:34:27,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:27,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:27,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:27,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:27,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:27,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:27,711 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 [2018-10-04 14:34:27,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:27,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:27,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:27,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:34:27,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:34:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:34:27,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:27,836 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-10-04 14:34:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:27,875 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-04 14:34:27,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:34:27,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-10-04 14:34:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:27,878 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:34:27,878 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:34:27,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-04 14:34:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:34:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:34:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:34:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-04 14:34:27,883 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-10-04 14:34:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:27,883 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-04 14:34:27,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:34:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-04 14:34:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:34:27,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:27,884 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-10-04 14:34:27,884 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:27,885 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:27,885 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-10-04 14:34:27,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:27,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:27,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:27,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:27,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:28,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:28,021 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 [2018-10-04 14:34:28,029 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:28,043 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 14:34:28,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:28,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:28,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:28,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:34:28,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:34:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:34:28,135 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:28,135 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-10-04 14:34:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:28,186 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-10-04 14:34:28,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:34:28,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-10-04 14:34:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:28,188 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:34:28,188 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:34:28,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-04 14:34:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:34:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 14:34:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:34:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 14:34:28,193 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-10-04 14:34:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:28,193 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 14:34:28,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:34:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 14:34:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 14:34:28,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:28,195 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-10-04 14:34:28,195 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:28,195 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-10-04 14:34:28,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:28,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:28,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:28,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:28,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:28,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:28,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:28,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:28,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:28,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:28,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:28,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:28,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:34:28,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:34:28,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:34:28,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:28,570 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-10-04 14:34:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:28,603 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-10-04 14:34:28,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:34:28,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-10-04 14:34:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:28,605 INFO L225 Difference]: With dead ends: 36 [2018-10-04 14:34:28,605 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 14:34:28,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 14:34:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 14:34:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 14:34:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 14:34:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-04 14:34:28,611 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-04 14:34:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:28,611 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-04 14:34:28,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:34:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-04 14:34:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 14:34:28,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:28,613 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-10-04 14:34:28,613 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:28,613 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:28,613 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-10-04 14:34:28,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:28,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:28,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:28,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:28,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:28,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:28,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:28,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:28,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:28,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:28,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:34:28,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:34:28,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:34:28,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:28,921 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-10-04 14:34:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:28,988 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-10-04 14:34:28,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:34:28,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-10-04 14:34:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:28,989 INFO L225 Difference]: With dead ends: 38 [2018-10-04 14:34:28,989 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 14:34:28,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-04 14:34:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 14:34:28,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 14:34:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 14:34:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-04 14:34:28,994 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-10-04 14:34:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:28,994 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-04 14:34:28,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:34:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-04 14:34:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:34:28,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:28,995 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-10-04 14:34:28,995 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:28,995 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:28,995 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-10-04 14:34:28,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:28,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:28,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:28,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:28,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:29,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:29,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:29,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:29,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 14:34:29,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:29,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:30,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:30,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 14:34:30,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:34:30,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:34:30,261 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:30,261 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-10-04 14:34:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:30,619 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-10-04 14:34:30,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:34:30,619 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-10-04 14:34:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:30,620 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:34:30,620 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:34:30,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 22 [2018-10-04 14:34:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:34:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:34:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:34:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-04 14:34:30,626 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-10-04 14:34:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:30,626 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-04 14:34:30,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:34:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-04 14:34:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 14:34:30,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:30,627 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-10-04 14:34:30,628 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:30,628 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:30,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-10-04 14:34:30,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:30,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:30,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:30,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:30,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:30,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:30,781 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 [2018-10-04 14:34:30,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:30,807 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:30,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:30,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:31,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:31,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 14:34:31,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:34:31,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:34:31,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:31,170 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-10-04 14:34:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:31,522 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-10-04 14:34:31,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:34:31,523 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-10-04 14:34:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:31,523 INFO L225 Difference]: With dead ends: 44 [2018-10-04 14:34:31,524 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 14:34:31,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 24 [2018-10-04 14:34:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 14:34:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 14:34:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 14:34:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 14:34:31,529 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-10-04 14:34:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:31,529 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 14:34:31,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:34:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 14:34:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:34:31,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:31,531 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-10-04 14:34:31,531 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:31,531 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-10-04 14:34:31,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:31,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:31,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:31,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:31,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:31,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:31,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:31,695 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:31,778 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 14:34:31,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:31,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:31,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:31,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:34:31,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:34:31,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:34:31,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:31,883 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-10-04 14:34:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:31,946 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-10-04 14:34:31,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:34:31,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-10-04 14:34:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:31,948 INFO L225 Difference]: With dead ends: 45 [2018-10-04 14:34:31,948 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:34:31,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 12 [2018-10-04 14:34:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:34:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:34:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:34:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-04 14:34:31,953 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-10-04 14:34:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:31,954 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-04 14:34:31,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:34:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-04 14:34:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:34:31,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:31,955 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-10-04 14:34:31,955 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:31,955 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:31,955 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-10-04 14:34:31,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:31,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:31,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:31,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:31,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:32,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:32,393 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 [2018-10-04 14:34:32,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:32,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:32,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:32,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:32,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:32,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:34:32,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:34:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:34:32,517 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:32,517 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-10-04 14:34:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:32,591 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-10-04 14:34:32,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:34:32,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-10-04 14:34:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:32,592 INFO L225 Difference]: With dead ends: 47 [2018-10-04 14:34:32,592 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:34:32,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 14:34:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:34:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 14:34:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 14:34:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-04 14:34:32,597 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-10-04 14:34:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:32,598 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-04 14:34:32,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:34:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-04 14:34:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 14:34:32,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:32,599 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-10-04 14:34:32,599 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:32,599 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:32,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-10-04 14:34:32,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:32,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:32,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:32,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:32,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:33,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:33,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:33,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:33,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 14:34:33,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:33,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:34,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:34,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 14:34:34,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:34:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:34:34,202 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:34,202 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-10-04 14:34:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:34,642 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-10-04 14:34:34,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:34:34,645 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-10-04 14:34:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:34,646 INFO L225 Difference]: With dead ends: 50 [2018-10-04 14:34:34,646 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 14:34:34,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.2s impTime 28 [2018-10-04 14:34:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 14:34:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 14:34:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 14:34:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 14:34:34,651 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-10-04 14:34:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:34,652 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 14:34:34,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:34:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 14:34:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:34:34,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:34,653 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-10-04 14:34:34,653 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:34,653 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-10-04 14:34:34,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:34,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:34,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:34,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:34,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:34,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:34,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:34,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:34,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:35,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:35,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:34:35,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:34:35,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:34:35,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:35,077 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-10-04 14:34:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:35,113 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-04 14:34:35,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:34:35,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-04 14:34:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:35,115 INFO L225 Difference]: With dead ends: 51 [2018-10-04 14:34:35,115 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:34:35,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 14 [2018-10-04 14:34:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:34:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 14:34:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 14:34:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-04 14:34:35,119 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-10-04 14:34:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:35,120 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-04 14:34:35,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:34:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-04 14:34:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:34:35,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:35,121 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-10-04 14:34:35,121 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:35,122 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-10-04 14:34:35,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:35,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:35,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:35,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:35,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:35,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:35,311 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 [2018-10-04 14:34:35,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:35,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:34:35,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:35,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:35,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:35,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:34:35,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:34:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:34:35,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:35,474 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-10-04 14:34:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:35,583 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-10-04 14:34:35,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:34:35,584 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-10-04 14:34:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:35,585 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:34:35,585 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 14:34:35,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-04 14:34:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 14:34:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 14:34:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 14:34:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-04 14:34:35,590 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-10-04 14:34:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:35,590 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-04 14:34:35,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:34:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-04 14:34:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 14:34:35,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:35,591 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-10-04 14:34:35,591 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:35,592 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-10-04 14:34:35,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:35,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:35,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:35,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:35,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:35,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:35,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:35,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:35,881 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:35,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:35,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:36,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:36,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:34:36,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:34:36,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:34:36,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:36,051 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-10-04 14:34:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:36,131 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-10-04 14:34:36,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:34:36,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-10-04 14:34:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:36,133 INFO L225 Difference]: With dead ends: 54 [2018-10-04 14:34:36,133 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 14:34:36,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 15 [2018-10-04 14:34:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 14:34:36,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 14:34:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 14:34:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 14:34:36,137 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-04 14:34:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:36,137 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 14:34:36,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:34:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 14:34:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 14:34:36,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:36,138 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-10-04 14:34:36,138 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:36,138 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-10-04 14:34:36,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:36,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:36,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:36,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:36,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:36,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:36,405 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 [2018-10-04 14:34:36,411 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:36,425 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:36,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:36,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:36,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:36,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:34:36,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:34:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:34:36,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:36,549 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-10-04 14:34:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:36,615 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-10-04 14:34:36,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:34:36,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-10-04 14:34:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:36,616 INFO L225 Difference]: With dead ends: 56 [2018-10-04 14:34:36,616 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 14:34:36,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 16 [2018-10-04 14:34:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 14:34:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 14:34:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 14:34:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 14:34:36,621 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-10-04 14:34:36,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:36,621 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 14:34:36,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:34:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 14:34:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:34:36,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:36,622 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-10-04 14:34:36,622 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:36,622 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:36,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-10-04 14:34:36,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:36,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:36,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:36,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:36,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:36,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:36,788 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 [2018-10-04 14:34:36,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:36,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-04 14:34:36,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:36,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:37,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:37,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 14:34:37,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:34:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:34:37,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:37,115 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-10-04 14:34:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:37,617 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-04 14:34:37,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:34:37,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-10-04 14:34:37,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:37,618 INFO L225 Difference]: With dead ends: 59 [2018-10-04 14:34:37,619 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 14:34:37,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.6s impTime 34 [2018-10-04 14:34:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 14:34:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 14:34:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 14:34:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-04 14:34:37,624 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-10-04 14:34:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:37,624 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-04 14:34:37,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:34:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-04 14:34:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 14:34:37,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:37,625 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-10-04 14:34:37,625 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:37,626 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-10-04 14:34:37,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:37,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:37,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:37,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:37,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:37,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:37,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:37,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:37,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:37,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:37,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:37,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:37,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:34:37,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:34:37,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:34:37,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:37,976 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-10-04 14:34:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:38,017 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-10-04 14:34:38,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:34:38,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-10-04 14:34:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:38,019 INFO L225 Difference]: With dead ends: 60 [2018-10-04 14:34:38,019 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 14:34:38,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 17 [2018-10-04 14:34:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 14:34:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 14:34:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 14:34:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 14:34:38,022 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-04 14:34:38,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:38,022 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 14:34:38,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:34:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 14:34:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 14:34:38,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:38,023 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-10-04 14:34:38,023 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:38,023 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-10-04 14:34:38,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:38,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:38,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:38,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:38,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:38,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:38,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:38,231 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:38,264 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 14:34:38,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:38,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:38,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:38,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:34:38,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:34:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:34:38,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:38,416 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-10-04 14:34:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:38,458 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-10-04 14:34:38,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:34:38,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-10-04 14:34:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:38,459 INFO L225 Difference]: With dead ends: 62 [2018-10-04 14:34:38,460 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 14:34:38,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 18 [2018-10-04 14:34:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 14:34:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 14:34:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 14:34:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-04 14:34:38,464 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-10-04 14:34:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:38,464 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-04 14:34:38,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:34:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-04 14:34:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:34:38,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:38,465 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-10-04 14:34:38,465 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:38,465 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-10-04 14:34:38,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:38,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:38,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:38,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:38,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:38,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:38,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:38,774 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:38,801 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 14:34:38,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:38,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:38,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:38,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:34:38,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:34:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:34:38,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:38,914 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-10-04 14:34:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:38,949 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-10-04 14:34:38,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:34:38,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-10-04 14:34:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:38,951 INFO L225 Difference]: With dead ends: 63 [2018-10-04 14:34:38,951 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:34:38,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 18 [2018-10-04 14:34:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:34:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 14:34:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:34:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-04 14:34:38,955 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-10-04 14:34:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:38,955 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-04 14:34:38,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:34:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-04 14:34:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:34:38,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:38,955 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-10-04 14:34:38,956 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:38,956 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-10-04 14:34:38,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:38,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:38,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:38,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:38,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:40,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:40,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:40,194 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:40,235 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 14:34:40,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:40,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:40,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:40,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:34:40,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:34:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:34:40,440 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:40,440 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-10-04 14:34:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:40,522 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-10-04 14:34:40,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:34:40,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-10-04 14:34:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:40,524 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:34:40,524 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:34:40,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 19 [2018-10-04 14:34:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:34:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 14:34:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 14:34:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-04 14:34:40,528 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-10-04 14:34:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:40,528 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-04 14:34:40,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:34:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-04 14:34:40,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 14:34:40,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:40,529 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-10-04 14:34:40,529 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:40,529 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-10-04 14:34:40,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:40,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:40,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:40,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:40,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:40,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:40,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:40,829 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:40,860 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 14:34:40,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:40,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:41,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:41,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 14:34:41,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:34:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:34:41,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:41,318 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-10-04 14:34:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:43,479 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-10-04 14:34:43,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:34:43,480 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-10-04 14:34:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:43,481 INFO L225 Difference]: With dead ends: 68 [2018-10-04 14:34:43,481 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 14:34:43,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.0s impTime 40 [2018-10-04 14:34:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 14:34:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 14:34:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 14:34:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-04 14:34:43,484 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-10-04 14:34:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:43,484 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-04 14:34:43,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:34:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-04 14:34:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:34:43,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:43,485 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-10-04 14:34:43,486 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:43,486 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-10-04 14:34:43,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:43,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:43,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:43,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:43,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:43,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:43,781 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 [2018-10-04 14:34:43,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:43,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:44,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:44,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 14:34:44,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:34:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:34:44,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:44,062 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-10-04 14:34:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:44,123 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-10-04 14:34:44,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:34:44,124 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-10-04 14:34:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:44,125 INFO L225 Difference]: With dead ends: 69 [2018-10-04 14:34:44,125 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 14:34:44,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 20 [2018-10-04 14:34:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 14:34:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 14:34:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 14:34:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-04 14:34:44,129 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-10-04 14:34:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:44,129 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-04 14:34:44,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:34:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-04 14:34:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:34:44,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:44,130 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-10-04 14:34:44,130 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:44,131 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:44,131 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-10-04 14:34:44,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:44,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:44,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:44,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:44,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:44,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:44,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:44,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:44,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:44,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:44,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 14:34:44,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:34:44,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:34:44,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:44,682 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-10-04 14:34:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:44,716 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-10-04 14:34:44,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:34:44,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-10-04 14:34:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:44,718 INFO L225 Difference]: With dead ends: 71 [2018-10-04 14:34:44,718 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 14:34:44,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 21 [2018-10-04 14:34:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 14:34:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 14:34:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 14:34:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-04 14:34:44,721 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-10-04 14:34:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:44,721 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-04 14:34:44,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:34:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-04 14:34:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 14:34:44,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:44,722 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-10-04 14:34:44,722 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:44,722 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:44,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-10-04 14:34:44,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:44,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:44,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:44,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:44,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:45,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:45,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:45,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:45,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:45,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:45,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:45,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:45,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 14:34:45,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:34:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:34:45,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:45,173 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-10-04 14:34:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:45,220 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-10-04 14:34:45,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:34:45,220 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-10-04 14:34:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:45,221 INFO L225 Difference]: With dead ends: 72 [2018-10-04 14:34:45,222 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 14:34:45,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 21 [2018-10-04 14:34:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 14:34:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 14:34:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 14:34:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-04 14:34:45,225 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-04 14:34:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:45,225 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-04 14:34:45,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:34:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-04 14:34:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 14:34:45,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:45,226 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-10-04 14:34:45,226 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:45,226 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:45,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-10-04 14:34:45,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:45,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:45,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:45,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:45,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:45,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:45,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:45,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:45,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:45,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:45,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:45,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:45,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 14:34:45,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:34:45,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:34:45,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:45,681 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-10-04 14:34:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:45,711 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-10-04 14:34:45,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:34:45,711 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-10-04 14:34:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:45,712 INFO L225 Difference]: With dead ends: 74 [2018-10-04 14:34:45,712 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 14:34:45,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 22 [2018-10-04 14:34:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 14:34:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 14:34:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 14:34:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 14:34:45,717 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-10-04 14:34:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:45,717 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 14:34:45,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:34:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 14:34:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 14:34:45,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:45,718 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-10-04 14:34:45,718 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:45,718 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-10-04 14:34:45,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:45,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:45,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:45,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:45,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:46,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:46,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:46,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:46,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-04 14:34:46,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:46,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:46,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:46,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 14:34:46,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:34:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:34:46,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:46,647 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-10-04 14:34:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:47,645 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-10-04 14:34:47,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:34:47,645 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-10-04 14:34:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:47,646 INFO L225 Difference]: With dead ends: 77 [2018-10-04 14:34:47,646 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 14:34:47,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 46 [2018-10-04 14:34:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 14:34:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 14:34:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 14:34:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-04 14:34:47,649 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-10-04 14:34:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:47,650 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-04 14:34:47,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:34:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-04 14:34:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 14:34:47,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:47,651 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-10-04 14:34:47,651 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:47,651 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-10-04 14:34:47,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:47,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:47,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:47,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:47,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:47,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:47,966 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 [2018-10-04 14:34:47,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:48,008 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:48,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:48,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:48,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:48,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 14:34:48,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 14:34:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 14:34:48,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:48,501 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-10-04 14:34:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:49,680 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-10-04 14:34:49,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:34:49,680 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-10-04 14:34:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:49,681 INFO L225 Difference]: With dead ends: 80 [2018-10-04 14:34:49,681 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 14:34:49,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 48 [2018-10-04 14:34:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 14:34:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 14:34:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 14:34:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 14:34:49,684 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-10-04 14:34:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:49,684 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 14:34:49,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 14:34:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 14:34:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:34:49,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:49,685 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-10-04 14:34:49,685 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:49,685 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:49,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-10-04 14:34:49,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:49,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:49,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:49,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:49,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:49,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:49,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:49,956 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:49,995 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 14:34:49,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:49,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:50,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:50,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 14:34:50,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:34:50,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:34:50,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:50,125 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-10-04 14:34:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:50,247 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-10-04 14:34:50,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:34:50,248 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-10-04 14:34:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:50,248 INFO L225 Difference]: With dead ends: 81 [2018-10-04 14:34:50,249 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 14:34:50,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 24 [2018-10-04 14:34:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 14:34:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 14:34:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 14:34:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-10-04 14:34:50,252 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-10-04 14:34:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:50,252 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-10-04 14:34:50,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:34:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-10-04 14:34:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:34:50,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:50,253 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-10-04 14:34:50,253 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:50,254 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-10-04 14:34:50,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:50,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:50,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:50,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:50,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:50,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:50,828 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 [2018-10-04 14:34:50,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:50,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 14:34:50,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:50,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:51,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:51,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 14:34:51,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:34:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:34:51,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:51,042 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-10-04 14:34:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:51,101 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-10-04 14:34:51,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:34:51,101 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-10-04 14:34:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:51,102 INFO L225 Difference]: With dead ends: 83 [2018-10-04 14:34:51,102 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 14:34:51,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 25 [2018-10-04 14:34:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 14:34:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 14:34:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 14:34:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-10-04 14:34:51,106 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-10-04 14:34:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:51,107 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-10-04 14:34:51,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:34:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-10-04 14:34:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 14:34:51,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:51,107 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-10-04 14:34:51,108 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:51,108 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-10-04 14:34:51,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:51,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:51,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:51,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:51,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:51,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:51,512 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 [2018-10-04 14:34:51,520 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:51,563 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 14:34:51,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:51,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:52,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:52,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 14:34:52,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:34:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:34:52,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:52,125 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-10-04 14:34:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:53,257 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-10-04 14:34:53,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:34:53,257 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-10-04 14:34:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:53,258 INFO L225 Difference]: With dead ends: 86 [2018-10-04 14:34:53,258 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 14:34:53,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 52 [2018-10-04 14:34:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 14:34:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 14:34:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 14:34:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-04 14:34:53,262 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-10-04 14:34:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:53,262 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-04 14:34:53,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:34:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-04 14:34:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 14:34:53,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:53,263 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-10-04 14:34:53,263 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:53,263 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-10-04 14:34:53,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:53,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:53,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:53,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:53,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:53,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:53,631 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 [2018-10-04 14:34:53,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:53,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:53,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:53,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 14:34:53,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:34:53,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:34:53,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:53,846 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-10-04 14:34:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:53,924 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-10-04 14:34:53,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:34:53,924 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-10-04 14:34:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:53,925 INFO L225 Difference]: With dead ends: 87 [2018-10-04 14:34:53,926 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 14:34:53,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 26 [2018-10-04 14:34:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 14:34:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 14:34:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 14:34:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-10-04 14:34:53,930 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-10-04 14:34:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:53,930 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-10-04 14:34:53,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:34:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-10-04 14:34:53,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 14:34:53,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:53,931 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-10-04 14:34:53,931 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:53,931 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:53,931 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-10-04 14:34:53,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:53,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:53,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:53,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:53,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:54,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:54,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:54,224 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:54,248 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:54,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:54,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:54,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:54,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 14:34:54,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:34:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:34:54,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:54,394 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-10-04 14:34:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:54,501 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-10-04 14:34:54,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:34:54,502 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-10-04 14:34:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:54,502 INFO L225 Difference]: With dead ends: 89 [2018-10-04 14:34:54,502 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 14:34:54,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 27 [2018-10-04 14:34:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 14:34:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 14:34:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 14:34:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-04 14:34:54,506 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-10-04 14:34:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:54,507 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-04 14:34:54,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:34:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-04 14:34:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 14:34:54,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:54,507 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-10-04 14:34:54,508 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:54,508 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:54,508 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-10-04 14:34:54,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:54,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:54,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:54,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:54,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:54,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:54,984 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 [2018-10-04 14:34:54,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:55,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:55,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:55,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:55,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:55,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 14:34:55,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:34:55,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:34:55,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:55,169 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-10-04 14:34:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:55,229 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-10-04 14:34:55,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:34:55,229 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-10-04 14:34:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:55,230 INFO L225 Difference]: With dead ends: 90 [2018-10-04 14:34:55,230 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 14:34:55,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 27 [2018-10-04 14:34:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 14:34:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 14:34:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 14:34:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 14:34:55,234 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-04 14:34:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:55,235 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 14:34:55,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:34:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 14:34:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 14:34:55,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:55,235 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-10-04 14:34:55,235 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:55,236 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-10-04 14:34:55,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:55,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:55,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:55,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:55,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:56,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:56,110 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 [2018-10-04 14:34:56,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:56,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 14:34:56,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:56,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:56,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:56,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 14:34:56,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:34:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:34:56,355 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:56,355 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-10-04 14:34:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:56,406 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-10-04 14:34:56,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:34:56,406 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-10-04 14:34:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:56,407 INFO L225 Difference]: With dead ends: 92 [2018-10-04 14:34:56,407 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 14:34:56,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 28 [2018-10-04 14:34:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 14:34:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 14:34:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 14:34:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-04 14:34:56,411 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-10-04 14:34:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:56,411 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-04 14:34:56,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:34:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-04 14:34:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 14:34:56,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:56,412 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-10-04 14:34:56,412 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:56,412 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-10-04 14:34:56,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:56,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:56,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:56,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:56,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:56,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:56,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:56,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:56,938 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-04 14:34:56,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:56,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:57,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:57,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 14:34:57,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:34:57,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:34:57,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:57,600 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-10-04 14:34:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:59,225 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-10-04 14:34:59,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:34:59,226 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-10-04 14:34:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:59,226 INFO L225 Difference]: With dead ends: 95 [2018-10-04 14:34:59,227 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 14:34:59,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 58 [2018-10-04 14:34:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 14:34:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 14:34:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 14:34:59,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 14:34:59,230 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-04 14:34:59,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:59,230 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 14:34:59,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:34:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 14:34:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 14:34:59,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:59,231 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-10-04 14:34:59,231 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:59,231 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-10-04 14:34:59,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:59,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:59,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:59,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:59,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:59,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:59,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:59,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:59,932 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:59,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:59,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:01,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:01,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 14:35:01,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:35:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:35:01,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:01,157 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-10-04 14:35:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:01,522 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-10-04 14:35:01,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:35:01,522 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-10-04 14:35:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:01,523 INFO L225 Difference]: With dead ends: 96 [2018-10-04 14:35:01,523 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 14:35:01,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.5s impTime 29 [2018-10-04 14:35:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 14:35:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 14:35:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 14:35:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-04 14:35:01,527 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-04 14:35:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:01,527 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-04 14:35:01,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:35:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-04 14:35:01,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 14:35:01,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:01,527 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-10-04 14:35:01,528 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:01,528 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:01,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-10-04 14:35:01,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:01,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:01,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:01,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:01,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:01,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:01,984 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 [2018-10-04 14:35:01,992 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:02,039 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-04 14:35:02,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:02,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:02,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:02,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 14:35:02,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:35:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:35:02,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:02,205 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-10-04 14:35:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:02,273 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-10-04 14:35:02,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:35:02,274 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-10-04 14:35:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:02,275 INFO L225 Difference]: With dead ends: 98 [2018-10-04 14:35:02,275 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 14:35:02,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 30 [2018-10-04 14:35:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 14:35:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 14:35:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 14:35:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 14:35:02,280 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-10-04 14:35:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:02,280 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 14:35:02,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:35:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 14:35:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 14:35:02,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:02,281 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-10-04 14:35:02,281 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:02,281 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-10-04 14:35:02,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:02,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:02,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:02,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:02,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:02,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:02,835 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 [2018-10-04 14:35:02,843 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:02,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 14:35:02,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:02,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:03,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:03,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 14:35:03,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:35:03,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:35:03,063 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:03,064 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-10-04 14:35:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:03,289 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-10-04 14:35:03,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:35:03,290 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-10-04 14:35:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:03,291 INFO L225 Difference]: With dead ends: 99 [2018-10-04 14:35:03,291 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 14:35:03,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 30 [2018-10-04 14:35:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 14:35:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 14:35:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 14:35:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-04 14:35:03,296 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-10-04 14:35:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:03,297 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-04 14:35:03,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:35:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-04 14:35:03,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 14:35:03,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:03,297 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-10-04 14:35:03,298 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:03,298 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:03,298 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-10-04 14:35:03,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:03,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:03,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:03,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:03,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:04,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:04,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:04,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:04,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:05,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:05,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 14:35:05,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 14:35:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 14:35:05,043 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:05,043 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-10-04 14:35:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:05,115 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-10-04 14:35:05,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:35:05,116 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-10-04 14:35:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:05,117 INFO L225 Difference]: With dead ends: 101 [2018-10-04 14:35:05,117 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 14:35:05,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 31 [2018-10-04 14:35:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 14:35:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 14:35:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 14:35:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-10-04 14:35:05,121 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-10-04 14:35:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:05,121 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-10-04 14:35:05,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 14:35:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-10-04 14:35:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 14:35:05,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:05,122 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-10-04 14:35:05,122 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:05,122 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:05,122 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-10-04 14:35:05,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:05,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:05,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:05,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:05,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:05,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:05,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:05,704 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:05,757 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-04 14:35:05,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:05,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:06,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:06,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 14:35:06,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 14:35:06,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 14:35:06,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:06,600 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-10-04 14:35:08,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:08,258 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-10-04 14:35:08,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:35:08,258 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-10-04 14:35:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:08,259 INFO L225 Difference]: With dead ends: 104 [2018-10-04 14:35:08,260 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 14:35:08,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 64 [2018-10-04 14:35:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 14:35:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 14:35:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 14:35:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 14:35:08,264 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-10-04 14:35:08,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:08,264 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 14:35:08,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 14:35:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 14:35:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 14:35:08,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:08,265 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-10-04 14:35:08,266 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:08,266 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-10-04 14:35:08,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:08,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:08,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:08,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:08,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:08,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:08,781 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 [2018-10-04 14:35:08,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:08,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:08,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:08,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 14:35:08,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:35:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:35:08,993 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:08,994 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-10-04 14:35:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:09,050 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-10-04 14:35:09,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:35:09,050 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-10-04 14:35:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:09,051 INFO L225 Difference]: With dead ends: 105 [2018-10-04 14:35:09,051 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 14:35:09,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 32 [2018-10-04 14:35:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 14:35:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 14:35:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 14:35:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 14:35:09,056 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-10-04 14:35:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:09,057 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 14:35:09,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:35:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 14:35:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 14:35:09,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:09,058 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-10-04 14:35:09,058 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:09,058 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-10-04 14:35:09,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:09,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:09,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:09,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:09,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:10,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:10,238 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 [2018-10-04 14:35:10,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:10,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:10,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:10,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:10,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:10,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 14:35:10,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:35:10,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:35:10,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:10,454 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-10-04 14:35:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:10,535 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-10-04 14:35:10,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:35:10,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-10-04 14:35:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:10,537 INFO L225 Difference]: With dead ends: 107 [2018-10-04 14:35:10,537 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 14:35:10,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 33 [2018-10-04 14:35:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 14:35:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 14:35:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 14:35:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-10-04 14:35:10,542 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-10-04 14:35:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:10,542 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-10-04 14:35:10,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:35:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-10-04 14:35:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 14:35:10,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:10,543 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-10-04 14:35:10,543 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:10,543 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-10-04 14:35:10,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:10,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:10,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:10,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:10,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:11,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:11,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:11,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:11,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:11,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:11,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:11,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:11,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 14:35:11,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:35:11,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:35:11,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:11,376 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-10-04 14:35:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:11,475 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-10-04 14:35:11,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:35:11,476 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-10-04 14:35:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:11,476 INFO L225 Difference]: With dead ends: 108 [2018-10-04 14:35:11,477 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 14:35:11,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 33 [2018-10-04 14:35:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 14:35:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 14:35:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 14:35:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-04 14:35:11,481 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-04 14:35:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:11,481 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-04 14:35:11,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:35:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-04 14:35:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 14:35:11,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:11,482 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-10-04 14:35:11,482 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:11,482 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:11,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-10-04 14:35:11,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:11,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:11,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:11,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:11,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:12,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:12,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:12,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:12,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 14:35:12,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:12,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:12,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:12,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 14:35:12,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:35:12,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:35:12,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:12,453 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-10-04 14:35:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:12,532 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-10-04 14:35:12,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:35:12,533 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-10-04 14:35:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:12,534 INFO L225 Difference]: With dead ends: 110 [2018-10-04 14:35:12,534 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 14:35:12,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 34 [2018-10-04 14:35:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 14:35:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 14:35:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 14:35:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 14:35:12,539 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-10-04 14:35:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:12,539 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 14:35:12,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:35:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 14:35:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 14:35:12,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:12,540 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-10-04 14:35:12,540 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:12,540 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-10-04 14:35:12,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:12,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:12,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:12,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:12,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:13,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:13,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:13,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:13,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-10-04 14:35:13,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:13,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:14,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:14,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 14:35:14,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 14:35:14,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 14:35:14,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:14,248 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-10-04 14:35:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:16,375 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-10-04 14:35:16,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 14:35:16,376 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-10-04 14:35:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:16,377 INFO L225 Difference]: With dead ends: 113 [2018-10-04 14:35:16,377 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 14:35:16,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime 70 [2018-10-04 14:35:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 14:35:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 14:35:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 14:35:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-10-04 14:35:16,381 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-10-04 14:35:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:16,381 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-10-04 14:35:16,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 14:35:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-10-04 14:35:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 14:35:16,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:16,382 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-10-04 14:35:16,383 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:16,383 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:16,383 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-10-04 14:35:16,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:16,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:16,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:16,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:16,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:17,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:17,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:17,183 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:17,215 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:17,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:17,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:17,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:17,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 14:35:17,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 14:35:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 14:35:17,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:17,390 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-10-04 14:35:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:17,652 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-10-04 14:35:17,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:35:17,653 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-10-04 14:35:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:17,654 INFO L225 Difference]: With dead ends: 114 [2018-10-04 14:35:17,654 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 14:35:17,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 35 [2018-10-04 14:35:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 14:35:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 14:35:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 14:35:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 14:35:17,658 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-04 14:35:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:17,658 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 14:35:17,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 14:35:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 14:35:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 14:35:17,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:17,659 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-10-04 14:35:17,660 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:17,660 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:17,660 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-10-04 14:35:17,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:17,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:17,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:17,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:17,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:18,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:18,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:18,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:18,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:18,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:18,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:18,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:18,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 14:35:18,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:35:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:35:18,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:18,518 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-10-04 14:35:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:18,602 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-04 14:35:18,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:35:18,603 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-10-04 14:35:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:18,604 INFO L225 Difference]: With dead ends: 116 [2018-10-04 14:35:18,604 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 14:35:18,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 36 [2018-10-04 14:35:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 14:35:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 14:35:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 14:35:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 14:35:18,609 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-04 14:35:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:18,609 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 14:35:18,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:35:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 14:35:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 14:35:18,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:18,610 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-10-04 14:35:18,610 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:18,611 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-10-04 14:35:18,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:18,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:18,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:18,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:18,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:19,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:19,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:19,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:19,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 14:35:19,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:19,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:19,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:19,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 14:35:19,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:35:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:35:19,877 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:19,877 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-10-04 14:35:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:19,968 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-10-04 14:35:19,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:35:19,968 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-10-04 14:35:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:19,969 INFO L225 Difference]: With dead ends: 117 [2018-10-04 14:35:19,970 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 14:35:19,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 36 [2018-10-04 14:35:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 14:35:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 14:35:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 14:35:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-10-04 14:35:19,974 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-10-04 14:35:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:19,974 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-10-04 14:35:19,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:35:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-10-04 14:35:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 14:35:19,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:19,974 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-10-04 14:35:19,975 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:19,975 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-10-04 14:35:19,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:19,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:19,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:19,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:19,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:20,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:20,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:20,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:20,851 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 14:35:20,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:20,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:21,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:21,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 14:35:21,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 14:35:21,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 14:35:21,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:21,066 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-10-04 14:35:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:21,118 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-10-04 14:35:21,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:35:21,118 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-10-04 14:35:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:21,119 INFO L225 Difference]: With dead ends: 119 [2018-10-04 14:35:21,119 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 14:35:21,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 37 [2018-10-04 14:35:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 14:35:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 14:35:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 14:35:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 14:35:21,123 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-10-04 14:35:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:21,123 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 14:35:21,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 14:35:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 14:35:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 14:35:21,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:21,123 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-10-04 14:35:21,124 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:21,124 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-10-04 14:35:21,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:21,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:21,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:21,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:21,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:21,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:21,704 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 [2018-10-04 14:35:21,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:21,773 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 14:35:21,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:21,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:23,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:23,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 14:35:23,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 14:35:23,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 14:35:23,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:23,006 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-10-04 14:35:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:25,616 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-10-04 14:35:25,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 14:35:25,616 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-10-04 14:35:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:25,617 INFO L225 Difference]: With dead ends: 122 [2018-10-04 14:35:25,617 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 14:35:25,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.5s impTime 76 [2018-10-04 14:35:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 14:35:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 14:35:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 14:35:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-04 14:35:25,621 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-10-04 14:35:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:25,622 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-04 14:35:25,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 14:35:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-04 14:35:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 14:35:25,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:25,623 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-10-04 14:35:25,623 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:25,623 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:25,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-10-04 14:35:25,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:25,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:25,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:25,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:25,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:26,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:26,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-04 14:35:26,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:26,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:27,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:27,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 14:35:27,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:35:27,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:35:27,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:27,952 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-10-04 14:35:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:28,040 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-10-04 14:35:28,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:35:28,040 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-10-04 14:35:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:28,041 INFO L225 Difference]: With dead ends: 123 [2018-10-04 14:35:28,041 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 14:35:28,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 0.5s impTime 38 [2018-10-04 14:35:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 14:35:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 14:35:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 14:35:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-04 14:35:28,044 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-10-04 14:35:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:28,044 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-04 14:35:28,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:35:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-04 14:35:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 14:35:28,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:28,045 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-10-04 14:35:28,045 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:28,045 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-10-04 14:35:28,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:28,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:28,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:28,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:28,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:28,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:28,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:28,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:29,163 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-04 14:35:29,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:29,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:29,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:29,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 14:35:29,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:35:29,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:35:29,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:29,453 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-10-04 14:35:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:29,519 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-10-04 14:35:29,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:35:29,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-10-04 14:35:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:29,520 INFO L225 Difference]: With dead ends: 125 [2018-10-04 14:35:29,520 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 14:35:29,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 39 [2018-10-04 14:35:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 14:35:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 14:35:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 14:35:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-04 14:35:29,524 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-10-04 14:35:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:29,524 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-04 14:35:29,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:35:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-04 14:35:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 14:35:29,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:29,525 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-10-04 14:35:29,525 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:29,525 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-10-04 14:35:29,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:29,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:29,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:29,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:29,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:30,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:30,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-04 14:35:30,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:30,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:30,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:30,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:30,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:30,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 14:35:30,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:35:30,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:35:30,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:30,754 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-10-04 14:35:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:30,842 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-10-04 14:35:30,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:35:30,842 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-10-04 14:35:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:30,843 INFO L225 Difference]: With dead ends: 126 [2018-10-04 14:35:30,843 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 14:35:30,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 39 [2018-10-04 14:35:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 14:35:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-04 14:35:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 14:35:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-04 14:35:30,846 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-10-04 14:35:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:30,846 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-04 14:35:30,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:35:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-04 14:35:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 14:35:30,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:30,847 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-10-04 14:35:30,848 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:30,848 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-10-04 14:35:30,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:30,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:30,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:30,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:30,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:31,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:31,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:31,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:31,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:31,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:31,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 14:35:31,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:35:31,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:35:31,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:31,783 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-10-04 14:35:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:31,911 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-10-04 14:35:31,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:35:31,912 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-10-04 14:35:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:31,913 INFO L225 Difference]: With dead ends: 128 [2018-10-04 14:35:31,913 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 14:35:31,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 40 [2018-10-04 14:35:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 14:35:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-04 14:35:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 14:35:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-10-04 14:35:31,917 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-10-04 14:35:31,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:31,917 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-10-04 14:35:31,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:35:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-10-04 14:35:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 14:35:31,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:31,918 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-10-04 14:35:31,918 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:31,918 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-10-04 14:35:31,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:31,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:31,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:31,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:31,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:32,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:32,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:32,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:32,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-04 14:35:32,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:32,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:33,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:33,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 14:35:33,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 14:35:33,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 14:35:33,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:33,845 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-10-04 14:35:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:36,284 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-10-04 14:35:36,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 14:35:36,284 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-10-04 14:35:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:36,285 INFO L225 Difference]: With dead ends: 131 [2018-10-04 14:35:36,286 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 14:35:36,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.4s impTime 82 [2018-10-04 14:35:36,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 14:35:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 14:35:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 14:35:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-10-04 14:35:36,290 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-10-04 14:35:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:36,290 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-10-04 14:35:36,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 14:35:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-10-04 14:35:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 14:35:36,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:36,291 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-10-04 14:35:36,292 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:36,292 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-10-04 14:35:36,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:36,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:36,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:36,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:36,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:36,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:36,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:36,971 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:37,007 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:37,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:37,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:37,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:37,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 14:35:37,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:35:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:35:37,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:37,244 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-10-04 14:35:37,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:37,340 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-10-04 14:35:37,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:35:37,340 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-10-04 14:35:37,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:37,341 INFO L225 Difference]: With dead ends: 132 [2018-10-04 14:35:37,341 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 14:35:37,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 41 [2018-10-04 14:35:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 14:35:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-04 14:35:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-04 14:35:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-10-04 14:35:37,345 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-10-04 14:35:37,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:37,345 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-10-04 14:35:37,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:35:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-10-04 14:35:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 14:35:37,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:37,346 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-10-04 14:35:37,346 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:37,346 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-10-04 14:35:37,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:37,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:37,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:37,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:37,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:38,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:38,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:38,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:38,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:38,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:38,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:38,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:38,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 14:35:38,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:35:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:35:38,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:38,494 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-10-04 14:35:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:38,549 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-10-04 14:35:38,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:35:38,549 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-10-04 14:35:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:38,550 INFO L225 Difference]: With dead ends: 134 [2018-10-04 14:35:38,550 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 14:35:38,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 42 [2018-10-04 14:35:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 14:35:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-04 14:35:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 14:35:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-04 14:35:38,554 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-10-04 14:35:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:38,554 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-04 14:35:38,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:35:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-04 14:35:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 14:35:38,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:38,555 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-10-04 14:35:38,555 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:38,555 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-10-04 14:35:38,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:38,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:38,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:38,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:38,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:39,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:39,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:39,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:39,324 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 14:35:39,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:39,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:40,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:40,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 14:35:40,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:35:40,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:35:40,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:40,470 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-10-04 14:35:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:41,839 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-10-04 14:35:41,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:35:41,839 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-10-04 14:35:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:41,840 INFO L225 Difference]: With dead ends: 135 [2018-10-04 14:35:41,840 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 14:35:41,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.5s impTime 42 [2018-10-04 14:35:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 14:35:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 14:35:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 14:35:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-04 14:35:41,844 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-10-04 14:35:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:41,844 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-04 14:35:41,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:35:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-04 14:35:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 14:35:41,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:41,845 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-10-04 14:35:41,845 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:41,846 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:41,846 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-10-04 14:35:41,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:41,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:41,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:41,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:41,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:42,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:42,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:42,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:42,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-10-04 14:35:42,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:42,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:42,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:42,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 14:35:42,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 14:35:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 14:35:42,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:42,798 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-10-04 14:35:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:42,881 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-10-04 14:35:42,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:35:42,881 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-10-04 14:35:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:42,882 INFO L225 Difference]: With dead ends: 137 [2018-10-04 14:35:42,883 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 14:35:42,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 43 [2018-10-04 14:35:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 14:35:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 14:35:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 14:35:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-04 14:35:42,886 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-04 14:35:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:42,887 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-04 14:35:42,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 14:35:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-04 14:35:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-04 14:35:42,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:42,887 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-10-04 14:35:42,887 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:42,888 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:42,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-10-04 14:35:42,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:42,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:42,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:42,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:42,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:43,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:43,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:43,394 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:43,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-04 14:35:43,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:43,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:44,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:44,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 14:35:44,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 14:35:44,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 14:35:44,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:44,443 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-10-04 14:35:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:46,927 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-10-04 14:35:46,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 14:35:46,927 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-10-04 14:35:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:46,928 INFO L225 Difference]: With dead ends: 140 [2018-10-04 14:35:46,928 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 14:35:46,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 3.1s impTime 88 [2018-10-04 14:35:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 14:35:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 14:35:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 14:35:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 14:35:46,931 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-10-04 14:35:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:46,931 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 14:35:46,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 14:35:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 14:35:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 14:35:46,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:46,932 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-10-04 14:35:46,932 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:46,932 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-10-04 14:35:46,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:46,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:46,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:46,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:46,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:47,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:47,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:47,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:47,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:47,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:47,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 14:35:47,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:35:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:35:47,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:47,944 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-10-04 14:35:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:48,046 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-10-04 14:35:48,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:35:48,046 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-10-04 14:35:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:48,047 INFO L225 Difference]: With dead ends: 141 [2018-10-04 14:35:48,047 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 14:35:48,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 44 [2018-10-04 14:35:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 14:35:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 14:35:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 14:35:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-10-04 14:35:48,052 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-10-04 14:35:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:48,052 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-10-04 14:35:48,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:35:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-10-04 14:35:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 14:35:48,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:48,053 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-10-04 14:35:48,053 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:48,053 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-10-04 14:35:48,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:48,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:48,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:48,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:48,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:48,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:48,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:48,940 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:48,979 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:48,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:48,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:49,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:49,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 14:35:49,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:35:49,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:35:49,209 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:49,209 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-10-04 14:35:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:49,280 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-10-04 14:35:49,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:35:49,280 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-10-04 14:35:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:49,282 INFO L225 Difference]: With dead ends: 143 [2018-10-04 14:35:49,282 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 14:35:49,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 45 [2018-10-04 14:35:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 14:35:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 14:35:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 14:35:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-10-04 14:35:49,287 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-10-04 14:35:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:49,287 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-10-04 14:35:49,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:35:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-10-04 14:35:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 14:35:49,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:49,288 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-10-04 14:35:49,288 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:49,289 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-10-04 14:35:49,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:49,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:49,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:49,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:49,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:50,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:50,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:50,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:50,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:50,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:50,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:50,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:50,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 14:35:50,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:35:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:35:50,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:50,487 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-10-04 14:35:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:50,602 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-10-04 14:35:50,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:35:50,603 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-10-04 14:35:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:50,604 INFO L225 Difference]: With dead ends: 144 [2018-10-04 14:35:50,604 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 14:35:50,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 45 [2018-10-04 14:35:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 14:35:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-04 14:35:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 14:35:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-04 14:35:50,608 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-10-04 14:35:50,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:50,608 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-04 14:35:50,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:35:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-04 14:35:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 14:35:50,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:50,609 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-10-04 14:35:50,610 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:50,610 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-10-04 14:35:50,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:50,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:50,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:50,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:50,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:51,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:51,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:51,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:51,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 14:35:51,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:51,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:51,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:51,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 14:35:51,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:35:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:35:51,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:51,833 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-10-04 14:35:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:51,930 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-10-04 14:35:51,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:35:51,931 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-10-04 14:35:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:51,932 INFO L225 Difference]: With dead ends: 146 [2018-10-04 14:35:51,932 INFO L226 Difference]: Without dead ends: 142 [2018-10-04 14:35:51,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 46 [2018-10-04 14:35:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-04 14:35:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-04 14:35:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-04 14:35:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-10-04 14:35:51,937 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-10-04 14:35:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:51,937 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-10-04 14:35:51,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:35:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-10-04 14:35:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 14:35:51,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:51,938 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-10-04 14:35:51,938 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:51,938 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-10-04 14:35:51,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:51,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:51,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:51,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:51,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:52,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:52,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:52,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:52,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-10-04 14:35:52,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:52,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:53,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:53,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 14:35:53,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:35:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:35:53,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:53,074 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-10-04 14:35:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:53,278 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-10-04 14:35:53,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:35:53,278 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-10-04 14:35:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:53,279 INFO L225 Difference]: With dead ends: 147 [2018-10-04 14:35:53,280 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 14:35:53,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 46 [2018-10-04 14:35:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 14:35:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 14:35:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 14:35:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-04 14:35:53,283 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-10-04 14:35:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:53,284 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-04 14:35:53,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:35:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-04 14:35:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 14:35:53,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:53,285 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-10-04 14:35:53,285 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:53,285 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-10-04 14:35:53,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:53,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:53,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:53,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:53,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:54,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:54,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:54,217 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:54,301 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-04 14:35:54,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:54,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:54,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:54,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 14:35:54,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 14:35:54,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 14:35:54,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:54,571 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-10-04 14:35:54,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:54,682 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-04 14:35:54,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:35:54,683 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-10-04 14:35:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:54,684 INFO L225 Difference]: With dead ends: 149 [2018-10-04 14:35:54,684 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 14:35:54,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 47 [2018-10-04 14:35:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 14:35:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 14:35:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 14:35:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-04 14:35:54,688 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-10-04 14:35:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:54,688 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-04 14:35:54,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 14:35:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-04 14:35:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 14:35:54,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:54,689 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-10-04 14:35:54,690 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:54,690 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:54,690 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-10-04 14:35:54,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:54,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:54,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:54,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:54,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:55,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:55,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:55,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:55,747 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:55,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:55,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:57,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:57,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 14:35:57,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 14:35:57,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 14:35:57,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:57,552 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-10-04 14:36:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:00,763 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-10-04 14:36:00,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 14:36:00,763 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-10-04 14:36:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:00,764 INFO L225 Difference]: With dead ends: 152 [2018-10-04 14:36:00,764 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 14:36:00,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time 5.0s impTime 96 [2018-10-04 14:36:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 14:36:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-04 14:36:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 14:36:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-10-04 14:36:00,768 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-10-04 14:36:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:00,769 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-10-04 14:36:00,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 14:36:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-10-04 14:36:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 14:36:00,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:00,770 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-10-04 14:36:00,770 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:00,770 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:00,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-10-04 14:36:00,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:00,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:00,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:00,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:00,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:02,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:02,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:02,295 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:36:02,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 14:36:02,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:02,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:02,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:02,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 14:36:02,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:36:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:36:02,669 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:02,670 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-10-04 14:36:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:02,801 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-10-04 14:36:02,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:36:02,802 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-10-04 14:36:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:02,803 INFO L225 Difference]: With dead ends: 153 [2018-10-04 14:36:02,803 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 14:36:02,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 48 [2018-10-04 14:36:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 14:36:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 14:36:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 14:36:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-10-04 14:36:02,807 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-10-04 14:36:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:02,807 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-10-04 14:36:02,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:36:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-10-04 14:36:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 14:36:02,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:02,808 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-10-04 14:36:02,808 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:02,808 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:02,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-10-04 14:36:02,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:02,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:02,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:02,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:02,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:03,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:03,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:03,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:03,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:03,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:03,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 14:36:03,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 14:36:03,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 14:36:03,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:03,969 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-10-04 14:36:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:04,091 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-10-04 14:36:04,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:36:04,092 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-10-04 14:36:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:04,093 INFO L225 Difference]: With dead ends: 155 [2018-10-04 14:36:04,093 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 14:36:04,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 49 [2018-10-04 14:36:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 14:36:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 14:36:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 14:36:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-04 14:36:04,098 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-10-04 14:36:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:04,098 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-04 14:36:04,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 14:36:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-04 14:36:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 14:36:04,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:04,099 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-10-04 14:36:04,099 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:04,100 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-10-04 14:36:04,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:04,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:04,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:04,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:04,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:04,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:04,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:04,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:36:05,041 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-04 14:36:05,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:05,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:07,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:07,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 14:36:07,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 14:36:07,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 14:36:07,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:07,037 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-10-04 14:36:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:10,239 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-10-04 14:36:10,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 14:36:10,240 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-10-04 14:36:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:10,241 INFO L225 Difference]: With dead ends: 158 [2018-10-04 14:36:10,241 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 14:36:10,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time 5.0s impTime 100 [2018-10-04 14:36:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 14:36:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-04 14:36:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 14:36:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-10-04 14:36:10,244 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-10-04 14:36:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:10,244 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-10-04 14:36:10,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 14:36:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-10-04 14:36:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 14:36:10,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:10,245 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-10-04 14:36:10,246 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:10,246 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-10-04 14:36:10,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:10,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:10,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:10,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:10,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:11,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:11,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:11,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:11,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:11,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:11,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 14:36:11,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:36:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:36:11,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:11,470 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-10-04 14:36:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:11,607 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-10-04 14:36:11,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:36:11,608 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-10-04 14:36:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:11,609 INFO L225 Difference]: With dead ends: 159 [2018-10-04 14:36:11,609 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 14:36:11,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 50 [2018-10-04 14:36:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 14:36:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 14:36:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 14:36:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-04 14:36:11,614 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-10-04 14:36:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:11,614 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-04 14:36:11,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:36:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-04 14:36:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 14:36:11,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:11,615 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-10-04 14:36:11,616 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:11,616 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-10-04 14:36:11,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:11,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:11,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:11,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:11,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:13,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:13,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:13,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:36:13,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:36:13,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:13,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:13,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:13,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 14:36:13,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:36:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:36:13,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:13,326 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-10-04 14:36:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:13,528 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-10-04 14:36:13,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:36:13,529 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-10-04 14:36:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:13,530 INFO L225 Difference]: With dead ends: 161 [2018-10-04 14:36:13,530 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 14:36:13,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 51 [2018-10-04 14:36:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 14:36:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 14:36:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 14:36:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-04 14:36:13,534 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-10-04 14:36:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:13,534 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-04 14:36:13,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:36:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-04 14:36:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 14:36:13,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:13,535 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-10-04 14:36:13,535 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:13,535 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-10-04 14:36:13,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:13,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:13,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:13,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:13,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:14,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:14,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:14,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:36:14,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:36:14,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:14,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:14,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:14,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 14:36:14,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:36:14,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:36:14,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:14,676 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-10-04 14:36:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:14,788 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-10-04 14:36:14,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:36:14,789 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-10-04 14:36:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:14,790 INFO L225 Difference]: With dead ends: 162 [2018-10-04 14:36:14,790 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 14:36:14,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 51 [2018-10-04 14:36:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 14:36:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-04 14:36:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-04 14:36:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-10-04 14:36:14,795 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-10-04 14:36:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:14,796 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-10-04 14:36:14,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:36:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-10-04 14:36:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 14:36:14,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:14,797 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-10-04 14:36:14,797 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:14,797 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-10-04 14:36:14,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:14,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:14,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:14,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:14,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:15,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:15,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:15,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:36:15,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 14:36:15,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:15,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:16,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:16,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 14:36:16,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:36:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:36:16,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:16,022 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-10-04 14:36:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:16,115 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-10-04 14:36:16,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:36:16,116 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-10-04 14:36:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:16,117 INFO L225 Difference]: With dead ends: 164 [2018-10-04 14:36:16,117 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 14:36:16,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 52 [2018-10-04 14:36:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 14:36:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-04 14:36:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 14:36:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-04 14:36:16,121 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-10-04 14:36:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:16,122 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-04 14:36:16,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:36:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-04 14:36:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 14:36:16,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:16,123 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-10-04 14:36:16,123 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:16,123 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:16,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-10-04 14:36:16,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:16,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:16,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:16,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:16,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:17,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:17,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:17,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:36:17,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-10-04 14:36:17,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:17,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:18,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:18,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 14:36:18,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 14:36:18,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 14:36:18,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:18,434 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-10-04 14:36:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:22,476 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-10-04 14:36:22,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 14:36:22,477 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-10-04 14:36:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:22,478 INFO L225 Difference]: With dead ends: 167 [2018-10-04 14:36:22,478 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 14:36:22,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s Time 5.2s impTime 106 [2018-10-04 14:36:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 14:36:22,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 14:36:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 14:36:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-10-04 14:36:22,483 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-10-04 14:36:22,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:22,483 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-10-04 14:36:22,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 14:36:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-10-04 14:36:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 14:36:22,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:22,484 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-10-04 14:36:22,484 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:22,484 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:22,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-10-04 14:36:22,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:22,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:22,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:22,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:22,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:23,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:23,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:23,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:36:23,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:36:23,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:23,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:23,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:23,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 14:36:23,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 14:36:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 14:36:23,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:23,883 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-10-04 14:36:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:24,029 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-10-04 14:36:24,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:36:24,029 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-10-04 14:36:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:24,030 INFO L225 Difference]: With dead ends: 168 [2018-10-04 14:36:24,030 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 14:36:24,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 53 [2018-10-04 14:36:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 14:36:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-04 14:36:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 14:36:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-04 14:36:24,034 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-10-04 14:36:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:24,034 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-04 14:36:24,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 14:36:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-04 14:36:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 14:36:24,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:24,035 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-10-04 14:36:24,035 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:24,035 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:24,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-10-04 14:36:24,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:24,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:24,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:24,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:24,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:25,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:25,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:25,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:36:25,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:36:25,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:25,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:25,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:25,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 14:36:25,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:36:25,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:36:25,517 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:25,517 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-10-04 14:36:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:25,672 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-10-04 14:36:25,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:36:25,672 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-10-04 14:36:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:25,673 INFO L225 Difference]: With dead ends: 170 [2018-10-04 14:36:25,673 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 14:36:25,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 54 [2018-10-04 14:36:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 14:36:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-04 14:36:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-04 14:36:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-04 14:36:25,677 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-10-04 14:36:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:25,678 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-04 14:36:25,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:36:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-04 14:36:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 14:36:25,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:25,679 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-10-04 14:36:25,679 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:25,679 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-10-04 14:36:25,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:25,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:25,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:25,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:25,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:26,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:26,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:26,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:36:26,548 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 14:36:26,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:26,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:27,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:27,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 14:36:27,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:36:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:36:27,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:27,030 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-10-04 14:36:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:27,142 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-10-04 14:36:27,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:36:27,142 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-10-04 14:36:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:27,144 INFO L225 Difference]: With dead ends: 171 [2018-10-04 14:36:27,144 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 14:36:27,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 54 [2018-10-04 14:36:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 14:36:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 14:36:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 14:36:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-10-04 14:36:27,148 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-10-04 14:36:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:27,149 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-10-04 14:36:27,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:36:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-10-04 14:36:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 14:36:27,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:27,150 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-10-04 14:36:27,150 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:27,150 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:27,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-10-04 14:36:27,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:27,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:27,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:27,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:27,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:28,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:28,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:28,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:36:28,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 14:36:28,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:28,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:28,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:28,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 14:36:28,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 14:36:28,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 14:36:28,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:28,890 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-10-04 14:36:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:29,038 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-04 14:36:29,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:36:29,038 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-10-04 14:36:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:29,039 INFO L225 Difference]: With dead ends: 173 [2018-10-04 14:36:29,039 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 14:36:29,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.9s impTime 55 [2018-10-04 14:36:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 14:36:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 14:36:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 14:36:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-10-04 14:36:29,043 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-10-04 14:36:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:29,043 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-10-04 14:36:29,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 14:36:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-10-04 14:36:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 14:36:29,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:29,045 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-10-04 14:36:29,045 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:29,045 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:29,045 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-10-04 14:36:29,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:29,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:29,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:29,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:29,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:29,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:29,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:29,848 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:36:29,954 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-04 14:36:29,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:29,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:31,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:31,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 14:36:31,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-04 14:36:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-04 14:36:31,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:31,302 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-10-04 14:36:36,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:36,059 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-10-04 14:36:36,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-04 14:36:36,059 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-10-04 14:36:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:36,060 INFO L225 Difference]: With dead ends: 176 [2018-10-04 14:36:36,060 INFO L226 Difference]: Without dead ends: 172 [2018-10-04 14:36:36,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s Time 5.8s impTime 112 [2018-10-04 14:36:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-04 14:36:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-10-04 14:36:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-04 14:36:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-10-04 14:36:36,064 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-10-04 14:36:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:36,064 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-10-04 14:36:36,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-04 14:36:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-10-04 14:36:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 14:36:36,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:36,065 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-10-04 14:36:36,065 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:36,065 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-10-04 14:36:36,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:36,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:36,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:36,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:36,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:37,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:37,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:37,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:37,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:37,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:37,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 14:36:37,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:36:37,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:36:37,468 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:37,468 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-10-04 14:36:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:37,571 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-10-04 14:36:37,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:36:37,571 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-10-04 14:36:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:37,573 INFO L225 Difference]: With dead ends: 177 [2018-10-04 14:36:37,573 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 14:36:37,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 56 [2018-10-04 14:36:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 14:36:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 14:36:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 14:36:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-10-04 14:36:37,577 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-10-04 14:36:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:37,578 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-10-04 14:36:37,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:36:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-10-04 14:36:37,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 14:36:37,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:37,578 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-10-04 14:36:37,578 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:37,579 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-10-04 14:36:37,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:37,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:37,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:37,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:37,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:39,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:39,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:39,068 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:36:39,170 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-10-04 14:36:39,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:39,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:39,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:39,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 14:36:39,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:36:39,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:36:39,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:39,461 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-10-04 14:36:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:39,589 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-10-04 14:36:39,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:36:39,590 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-10-04 14:36:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:39,591 INFO L225 Difference]: With dead ends: 179 [2018-10-04 14:36:39,591 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 14:36:39,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 57 [2018-10-04 14:36:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 14:36:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 14:36:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 14:36:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 14:36:39,594 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-04 14:36:39,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:39,594 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 14:36:39,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:36:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 14:36:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 14:36:39,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:39,595 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-10-04 14:36:39,595 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:39,596 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-10-04 14:36:39,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:39,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:39,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:39,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:39,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:40,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:40,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:40,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:36:40,838 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:36:40,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:40,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:41,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:41,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 14:36:41,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:36:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:36:41,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:41,137 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-10-04 14:36:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:41,312 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-10-04 14:36:41,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:36:41,312 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-10-04 14:36:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:41,313 INFO L225 Difference]: With dead ends: 180 [2018-10-04 14:36:41,313 INFO L226 Difference]: Without dead ends: 176 [2018-10-04 14:36:41,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 57 [2018-10-04 14:36:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-04 14:36:41,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-04 14:36:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-04 14:36:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-04 14:36:41,317 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-10-04 14:36:41,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:41,318 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-04 14:36:41,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:36:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-04 14:36:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 14:36:41,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:41,319 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-10-04 14:36:41,319 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:41,319 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:41,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-10-04 14:36:41,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:41,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:41,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:41,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:41,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:42,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:42,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:42,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:42,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:43,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:43,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 14:36:43,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 14:36:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 14:36:43,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:43,049 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-10-04 14:36:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:43,225 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-10-04 14:36:43,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 14:36:43,226 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-10-04 14:36:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:43,227 INFO L225 Difference]: With dead ends: 182 [2018-10-04 14:36:43,227 INFO L226 Difference]: Without dead ends: 178 [2018-10-04 14:36:43,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 58 [2018-10-04 14:36:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-04 14:36:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-04 14:36:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-04 14:36:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-04 14:36:43,232 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-10-04 14:36:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:43,232 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-04 14:36:43,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 14:36:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-04 14:36:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 14:36:43,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:43,233 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-10-04 14:36:43,234 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:43,234 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-10-04 14:36:43,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:43,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:43,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:43,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:43,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:44,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:44,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:44,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:36:44,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-10-04 14:36:44,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:44,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:46,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:46,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 14:36:46,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-04 14:36:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-04 14:36:46,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:46,885 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-10-04 14:36:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:51,371 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-10-04 14:36:51,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-04 14:36:51,371 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-10-04 14:36:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:51,372 INFO L225 Difference]: With dead ends: 185 [2018-10-04 14:36:51,372 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 14:36:51,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s Time 6.8s impTime 118 [2018-10-04 14:36:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 14:36:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 14:36:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 14:36:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-04 14:36:51,375 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-10-04 14:36:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:51,375 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-04 14:36:51,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-04 14:36:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-04 14:36:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-04 14:36:51,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:51,376 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-10-04 14:36:51,377 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:51,377 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-10-04 14:36:51,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:51,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:51,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:51,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:51,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:52,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:52,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:52,446 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:36:52,498 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:36:52,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:52,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:52,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:52,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 14:36:52,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 14:36:52,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 14:36:52,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:52,820 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-10-04 14:36:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:52,986 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-10-04 14:36:52,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 14:36:52,986 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-10-04 14:36:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:52,987 INFO L225 Difference]: With dead ends: 186 [2018-10-04 14:36:52,987 INFO L226 Difference]: Without dead ends: 182 [2018-10-04 14:36:52,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 59 [2018-10-04 14:36:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-04 14:36:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-04 14:36:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-04 14:36:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-04 14:36:52,990 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-10-04 14:36:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:52,990 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-04 14:36:52,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 14:36:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-04 14:36:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-04 14:36:52,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:52,991 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-10-04 14:36:52,991 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:52,992 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-10-04 14:36:52,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:52,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:52,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:52,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:52,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:53,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:53,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:53,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:36:53,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:36:53,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:53,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:54,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:54,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 14:36:54,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 14:36:54,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 14:36:54,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:54,162 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-10-04 14:36:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:54,314 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-10-04 14:36:54,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 14:36:54,315 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-10-04 14:36:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:54,316 INFO L225 Difference]: With dead ends: 188 [2018-10-04 14:36:54,316 INFO L226 Difference]: Without dead ends: 184 [2018-10-04 14:36:54,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 60 [2018-10-04 14:36:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-04 14:36:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-10-04 14:36:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-04 14:36:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-10-04 14:36:54,321 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-10-04 14:36:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:54,321 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-10-04 14:36:54,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 14:36:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-10-04 14:36:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 14:36:54,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:54,322 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-10-04 14:36:54,322 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:54,322 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-10-04 14:36:54,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:54,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:54,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:54,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:54,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:54,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:54,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:54,901 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:36:55,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-04 14:36:55,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:55,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:55,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:55,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 14:36:55,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 14:36:55,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 14:36:55,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:55,329 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-10-04 14:36:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:55,437 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-10-04 14:36:55,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 14:36:55,437 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-10-04 14:36:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:55,438 INFO L225 Difference]: With dead ends: 189 [2018-10-04 14:36:55,439 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 14:36:55,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 60 [2018-10-04 14:36:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 14:36:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 14:36:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 14:36:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 14:36:55,442 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-10-04 14:36:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:55,443 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 14:36:55,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 14:36:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 14:36:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 14:36:55,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:55,443 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-10-04 14:36:55,444 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:55,444 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-10-04 14:36:55,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:55,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:55,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:55,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:55,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:56,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:56,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:56,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:36:56,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-10-04 14:36:56,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:56,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:56,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:56,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 14:36:56,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 14:36:56,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 14:36:56,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:56,699 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-10-04 14:36:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:56,868 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-10-04 14:36:56,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 14:36:56,868 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-10-04 14:36:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:56,869 INFO L225 Difference]: With dead ends: 191 [2018-10-04 14:36:56,869 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 14:36:56,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 61 [2018-10-04 14:36:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 14:36:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 14:36:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 14:36:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-10-04 14:36:56,872 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-10-04 14:36:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:56,873 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-10-04 14:36:56,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 14:36:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-10-04 14:36:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-04 14:36:56,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:56,873 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-10-04 14:36:56,874 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:56,874 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-10-04 14:36:56,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:56,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:56,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:56,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:56,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:57,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:57,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:57,826 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:36:57,939 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-10-04 14:36:57,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:57,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:59,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:59,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 14:36:59,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-04 14:36:59,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-04 14:36:59,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:59,180 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-10-04 14:37:04,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:04,010 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-10-04 14:37:04,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-04 14:37:04,010 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-10-04 14:37:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:04,011 INFO L225 Difference]: With dead ends: 194 [2018-10-04 14:37:04,011 INFO L226 Difference]: Without dead ends: 190 [2018-10-04 14:37:04,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s Time 5.7s impTime 124 [2018-10-04 14:37:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-04 14:37:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-10-04 14:37:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-04 14:37:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-04 14:37:04,015 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-10-04 14:37:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:04,016 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-04 14:37:04,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-04 14:37:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-04 14:37:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 14:37:04,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:04,016 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-10-04 14:37:04,017 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:04,017 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:04,017 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-10-04 14:37:04,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:04,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:04,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:04,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:04,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:04,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:04,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:04,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:04,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:05,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:05,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 14:37:05,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 14:37:05,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 14:37:05,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:05,116 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-10-04 14:37:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:05,275 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-10-04 14:37:05,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 14:37:05,276 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-10-04 14:37:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:05,277 INFO L225 Difference]: With dead ends: 195 [2018-10-04 14:37:05,277 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 14:37:05,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 62 [2018-10-04 14:37:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 14:37:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 14:37:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 14:37:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-04 14:37:05,282 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-10-04 14:37:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:05,282 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-04 14:37:05,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 14:37:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-04 14:37:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 14:37:05,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:05,283 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-10-04 14:37:05,284 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:05,284 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-10-04 14:37:05,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:05,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:05,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:05,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:05,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:05,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:05,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:05,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:05,934 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:05,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:05,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:06,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:06,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 14:37:06,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 14:37:06,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 14:37:06,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:06,253 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-10-04 14:37:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:06,384 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-10-04 14:37:06,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:37:06,384 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-10-04 14:37:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:06,385 INFO L225 Difference]: With dead ends: 197 [2018-10-04 14:37:06,385 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 14:37:06,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 63 [2018-10-04 14:37:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 14:37:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 14:37:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 14:37:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-10-04 14:37:06,390 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-10-04 14:37:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:06,390 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-10-04 14:37:06,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 14:37:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-10-04 14:37:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 14:37:06,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:06,391 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-10-04 14:37:06,392 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:06,392 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-10-04 14:37:06,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:06,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:06,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:06,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:06,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:07,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:07,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:07,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:07,329 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:07,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:07,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:07,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:07,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 14:37:07,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 14:37:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 14:37:07,880 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:07,880 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-10-04 14:37:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:08,016 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-10-04 14:37:08,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:37:08,016 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-10-04 14:37:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:08,017 INFO L225 Difference]: With dead ends: 198 [2018-10-04 14:37:08,017 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 14:37:08,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime 63 [2018-10-04 14:37:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 14:37:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-10-04 14:37:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-04 14:37:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-10-04 14:37:08,021 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-10-04 14:37:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:08,021 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-10-04 14:37:08,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 14:37:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-10-04 14:37:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 14:37:08,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:08,022 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-10-04 14:37:08,023 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:08,023 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:08,023 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-10-04 14:37:08,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:08,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:08,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:08,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:08,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:08,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:08,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:08,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:09,066 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-04 14:37:09,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:09,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:09,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:09,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 14:37:09,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 14:37:09,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 14:37:09,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:09,393 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-10-04 14:37:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:09,539 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-10-04 14:37:09,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 14:37:09,539 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-10-04 14:37:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:09,539 INFO L225 Difference]: With dead ends: 200 [2018-10-04 14:37:09,540 INFO L226 Difference]: Without dead ends: 196 [2018-10-04 14:37:09,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 64 [2018-10-04 14:37:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-04 14:37:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-04 14:37:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-04 14:37:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-04 14:37:09,544 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-10-04 14:37:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:09,544 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-04 14:37:09,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 14:37:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-04 14:37:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 14:37:09,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:09,545 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-10-04 14:37:09,546 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:09,546 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:09,546 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-10-04 14:37:09,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:09,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:09,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:09,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:09,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:10,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:10,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:10,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:10,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-10-04 14:37:10,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:10,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:11,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:11,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-04 14:37:11,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-04 14:37:11,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-04 14:37:11,708 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:11,708 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-10-04 14:37:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:16,588 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-10-04 14:37:16,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-10-04 14:37:16,588 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-10-04 14:37:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:16,589 INFO L225 Difference]: With dead ends: 203 [2018-10-04 14:37:16,589 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 14:37:16,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s Time 5.6s impTime 130 [2018-10-04 14:37:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 14:37:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 14:37:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 14:37:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-10-04 14:37:16,593 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-10-04 14:37:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:16,593 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-10-04 14:37:16,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-04 14:37:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-10-04 14:37:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 14:37:16,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:16,594 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-10-04 14:37:16,595 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:16,595 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-10-04 14:37:16,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:16,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:16,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:16,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:16,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:17,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:17,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:17,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:17,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:17,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:17,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:18,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:18,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 14:37:18,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 14:37:18,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 14:37:18,215 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:18,215 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-10-04 14:37:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:18,393 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-10-04 14:37:18,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 14:37:18,393 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-10-04 14:37:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:18,394 INFO L225 Difference]: With dead ends: 204 [2018-10-04 14:37:18,394 INFO L226 Difference]: Without dead ends: 200 [2018-10-04 14:37:18,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.7s impTime 65 [2018-10-04 14:37:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-04 14:37:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-10-04 14:37:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-04 14:37:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-04 14:37:18,401 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-10-04 14:37:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:18,401 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-04 14:37:18,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 14:37:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-04 14:37:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 14:37:18,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:18,402 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-10-04 14:37:18,402 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:18,402 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:18,402 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-10-04 14:37:18,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:18,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:18,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:18,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:18,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:19,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:19,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:19,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:19,196 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-10-04 14:37:19,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:19,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:19,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:19,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 14:37:19,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 14:37:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 14:37:19,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:19,528 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-10-04 14:37:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:19,674 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-10-04 14:37:19,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 14:37:19,674 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-10-04 14:37:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:19,675 INFO L225 Difference]: With dead ends: 206 [2018-10-04 14:37:19,675 INFO L226 Difference]: Without dead ends: 202 [2018-10-04 14:37:19,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 66 [2018-10-04 14:37:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-04 14:37:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-10-04 14:37:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-04 14:37:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-10-04 14:37:19,679 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-10-04 14:37:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:19,680 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-10-04 14:37:19,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 14:37:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-10-04 14:37:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 14:37:19,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:19,680 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-10-04 14:37:19,681 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:19,681 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-10-04 14:37:19,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:19,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:19,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:19,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:19,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:20,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:20,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:20,708 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:20,838 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-04 14:37:20,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:20,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:21,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:21,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 14:37:21,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 14:37:21,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 14:37:21,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:21,173 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-10-04 14:37:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:21,373 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-10-04 14:37:21,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 14:37:21,374 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-10-04 14:37:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:21,375 INFO L225 Difference]: With dead ends: 207 [2018-10-04 14:37:21,375 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 14:37:21,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 66 [2018-10-04 14:37:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 14:37:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 14:37:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 14:37:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-10-04 14:37:21,378 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-10-04 14:37:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:21,378 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-10-04 14:37:21,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 14:37:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-10-04 14:37:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 14:37:21,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:21,380 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-10-04 14:37:21,380 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:21,380 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:21,380 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-10-04 14:37:21,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:21,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:21,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:21,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:21,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:22,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:22,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:22,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:22,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:22,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:22,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 14:37:22,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 14:37:22,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 14:37:22,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:22,463 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-10-04 14:37:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:22,616 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-10-04 14:37:22,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 14:37:22,617 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-10-04 14:37:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:22,618 INFO L225 Difference]: With dead ends: 209 [2018-10-04 14:37:22,618 INFO L226 Difference]: Without dead ends: 205 [2018-10-04 14:37:22,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 67 [2018-10-04 14:37:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-04 14:37:22,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-04 14:37:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 14:37:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-04 14:37:22,624 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-10-04 14:37:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:22,624 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-04 14:37:22,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 14:37:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-04 14:37:22,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-04 14:37:22,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:22,625 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-10-04 14:37:22,625 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:22,625 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:22,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-10-04 14:37:22,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:22,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:22,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:22,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:22,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:23,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:23,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:23,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:24,022 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-04 14:37:24,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:24,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:26,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:26,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-04 14:37:26,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-04 14:37:26,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-04 14:37:26,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:26,008 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-10-04 14:37:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:31,017 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-10-04 14:37:31,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-10-04 14:37:31,017 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-10-04 14:37:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:31,018 INFO L225 Difference]: With dead ends: 212 [2018-10-04 14:37:31,018 INFO L226 Difference]: Without dead ends: 208 [2018-10-04 14:37:31,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s Time 6.9s impTime 136 [2018-10-04 14:37:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-04 14:37:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-10-04 14:37:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-04 14:37:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-10-04 14:37:31,022 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-10-04 14:37:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:31,023 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-10-04 14:37:31,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-04 14:37:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-10-04 14:37:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 14:37:31,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:31,024 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-10-04 14:37:31,024 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:31,024 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-10-04 14:37:31,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:31,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:31,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:31,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:31,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:31,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:31,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:31,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:31,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:32,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:32,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 14:37:32,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 14:37:32,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 14:37:32,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:32,291 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-10-04 14:37:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:32,461 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-10-04 14:37:32,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 14:37:32,461 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-10-04 14:37:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:32,462 INFO L225 Difference]: With dead ends: 213 [2018-10-04 14:37:32,462 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 14:37:32,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 68 [2018-10-04 14:37:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 14:37:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-04 14:37:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-04 14:37:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-10-04 14:37:32,466 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-10-04 14:37:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:32,467 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-10-04 14:37:32,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 14:37:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-10-04 14:37:32,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 14:37:32,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:32,468 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-10-04 14:37:32,468 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:32,468 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:32,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-10-04 14:37:32,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:32,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:32,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:32,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:32,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:33,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:33,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:33,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:33,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:33,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:33,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:34,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:34,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 14:37:34,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 14:37:34,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 14:37:34,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:34,245 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-10-04 14:37:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:34,486 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-10-04 14:37:34,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 14:37:34,486 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-10-04 14:37:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:34,487 INFO L225 Difference]: With dead ends: 215 [2018-10-04 14:37:34,487 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 14:37:34,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 69 [2018-10-04 14:37:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 14:37:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 14:37:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 14:37:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-04 14:37:34,492 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-10-04 14:37:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:34,492 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-04 14:37:34,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 14:37:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-04 14:37:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-04 14:37:34,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:34,493 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-10-04 14:37:34,493 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:34,493 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-10-04 14:37:34,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:34,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:34,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:34,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:34,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:35,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:35,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:35,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:35,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:35,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:35,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:35,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:36,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 14:37:36,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 14:37:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 14:37:36,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:36,001 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-10-04 14:37:36,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:36,222 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-10-04 14:37:36,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 14:37:36,223 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-10-04 14:37:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:36,223 INFO L225 Difference]: With dead ends: 216 [2018-10-04 14:37:36,224 INFO L226 Difference]: Without dead ends: 212 [2018-10-04 14:37:36,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 69 [2018-10-04 14:37:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-04 14:37:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-10-04 14:37:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-04 14:37:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-10-04 14:37:36,228 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-10-04 14:37:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:36,228 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-10-04 14:37:36,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 14:37:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-10-04 14:37:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-04 14:37:36,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:36,229 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-10-04 14:37:36,229 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:36,229 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:36,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-10-04 14:37:36,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:36,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:36,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:36,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:36,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:37,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:37,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:37,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:37,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 14:37:37,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:37,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:37,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:37,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 14:37:37,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 14:37:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 14:37:37,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:37,797 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-10-04 14:37:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:38,062 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-10-04 14:37:38,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 14:37:38,062 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-10-04 14:37:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:38,062 INFO L225 Difference]: With dead ends: 218 [2018-10-04 14:37:38,062 INFO L226 Difference]: Without dead ends: 214 [2018-10-04 14:37:38,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 70 [2018-10-04 14:37:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-04 14:37:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-10-04 14:37:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-04 14:37:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-10-04 14:37:38,066 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-10-04 14:37:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:38,066 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-10-04 14:37:38,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 14:37:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-10-04 14:37:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 14:37:38,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:38,067 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-10-04 14:37:38,067 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:38,067 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-10-04 14:37:38,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:38,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:38,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:38,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:38,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:39,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:39,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:39,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:39,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-10-04 14:37:39,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:39,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:40,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:40,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-04 14:37:40,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-10-04 14:37:40,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-10-04 14:37:40,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:40,692 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 143 states. [2018-10-04 14:37:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:45,937 INFO L93 Difference]: Finished difference Result 221 states and 228 transitions. [2018-10-04 14:37:45,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-10-04 14:37:45,937 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 212 [2018-10-04 14:37:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:45,938 INFO L225 Difference]: With dead ends: 221 [2018-10-04 14:37:45,938 INFO L226 Difference]: Without dead ends: 217 [2018-10-04 14:37:45,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s Time 6.3s impTime 142 [2018-10-04 14:37:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-10-04 14:37:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-10-04 14:37:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-04 14:37:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-10-04 14:37:45,941 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 212 [2018-10-04 14:37:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:45,941 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-10-04 14:37:45,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-10-04 14:37:45,942 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-10-04 14:37:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-04 14:37:45,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:45,942 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1] [2018-10-04 14:37:45,942 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:45,943 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1501738231, now seen corresponding path program 70 times [2018-10-04 14:37:45,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:45,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:45,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:45,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:45,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 71 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:47,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:47,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:47,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:47,164 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:47,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:47,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 71 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:47,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:47,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 14:37:47,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 14:37:47,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 14:37:47,544 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:47,544 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 73 states. [2018-10-04 14:37:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:47,789 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2018-10-04 14:37:47,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 14:37:47,789 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 215 [2018-10-04 14:37:47,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:47,790 INFO L225 Difference]: With dead ends: 222 [2018-10-04 14:37:47,790 INFO L226 Difference]: Without dead ends: 218 [2018-10-04 14:37:47,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 71 [2018-10-04 14:37:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-04 14:37:47,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-10-04 14:37:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-04 14:37:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2018-10-04 14:37:47,794 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 215 [2018-10-04 14:37:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:47,795 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2018-10-04 14:37:47,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 14:37:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2018-10-04 14:37:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-04 14:37:47,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:47,795 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1] [2018-10-04 14:37:47,796 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:47,796 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:47,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1501738169, now seen corresponding path program 46 times [2018-10-04 14:37:47,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:47,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:47,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:47,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:47,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:48,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:48,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:48,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:48,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:48,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:48,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:49,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:49,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 14:37:49,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 14:37:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 14:37:49,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:49,270 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand 74 states. [2018-10-04 14:37:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:49,472 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2018-10-04 14:37:49,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 14:37:49,472 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 215 [2018-10-04 14:37:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:49,473 INFO L225 Difference]: With dead ends: 224 [2018-10-04 14:37:49,473 INFO L226 Difference]: Without dead ends: 220 [2018-10-04 14:37:49,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 72 [2018-10-04 14:37:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-04 14:37:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-10-04 14:37:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-04 14:37:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-10-04 14:37:49,476 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 215 [2018-10-04 14:37:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:49,477 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-10-04 14:37:49,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 14:37:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-10-04 14:37:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 14:37:49,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:49,478 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1] [2018-10-04 14:37:49,478 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:49,478 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:49,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1902845547, now seen corresponding path program 71 times [2018-10-04 14:37:49,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:49,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:49,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:49,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:49,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 72 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:50,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:50,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:50,591 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:50,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-10-04 14:37:50,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:50,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 72 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:51,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:51,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 14:37:51,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 14:37:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 14:37:51,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:51,108 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 74 states. [2018-10-04 14:37:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:51,369 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2018-10-04 14:37:51,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 14:37:51,369 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 218 [2018-10-04 14:37:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:51,370 INFO L225 Difference]: With dead ends: 225 [2018-10-04 14:37:51,370 INFO L226 Difference]: Without dead ends: 221 [2018-10-04 14:37:51,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 72 [2018-10-04 14:37:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-04 14:37:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-04 14:37:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 14:37:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-10-04 14:37:51,374 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-10-04 14:37:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:51,374 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-10-04 14:37:51,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 14:37:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-10-04 14:37:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 14:37:51,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:51,375 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1] [2018-10-04 14:37:51,375 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:51,375 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1902845485, now seen corresponding path program 47 times [2018-10-04 14:37:51,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:51,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:51,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:51,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:52,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:52,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:52,281 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:52,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-10-04 14:37:52,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:52,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:52,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:52,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 14:37:52,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 14:37:52,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 14:37:52,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:52,871 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 75 states. [2018-10-04 14:37:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:53,093 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2018-10-04 14:37:53,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 14:37:53,094 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 218 [2018-10-04 14:37:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:53,094 INFO L225 Difference]: With dead ends: 227 [2018-10-04 14:37:53,095 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 14:37:53,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 73 [2018-10-04 14:37:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 14:37:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-04 14:37:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-04 14:37:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-10-04 14:37:53,098 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 218 [2018-10-04 14:37:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:53,098 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-10-04 14:37:53,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 14:37:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-10-04 14:37:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-04 14:37:53,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:53,099 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1] [2018-10-04 14:37:53,100 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:53,100 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:53,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1603088265, now seen corresponding path program 72 times [2018-10-04 14:37:53,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:53,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:53,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:53,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:53,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 73 proven. 7884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:54,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:54,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:54,602 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:54,740 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-10-04 14:37:54,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:54,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:57,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:57,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-04 14:37:57,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-10-04 14:37:57,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-10-04 14:37:57,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:57,212 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 149 states. [2018-10-04 14:38:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:03,131 INFO L93 Difference]: Finished difference Result 230 states and 237 transitions. [2018-10-04 14:38:03,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-04 14:38:03,132 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 221 [2018-10-04 14:38:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:03,132 INFO L225 Difference]: With dead ends: 230 [2018-10-04 14:38:03,132 INFO L226 Difference]: Without dead ends: 226 [2018-10-04 14:38:03,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s Time 8.3s impTime 148 [2018-10-04 14:38:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-04 14:38:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-10-04 14:38:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-04 14:38:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-10-04 14:38:03,135 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 221 [2018-10-04 14:38:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:03,136 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-10-04 14:38:03,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-10-04 14:38:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-10-04 14:38:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-04 14:38:03,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:03,137 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1] [2018-10-04 14:38:03,137 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:03,137 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1862577429, now seen corresponding path program 73 times [2018-10-04 14:38:03,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:03,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:03,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:03,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:03,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 74 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:04,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:04,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:04,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:04,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 74 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:05,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:05,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 14:38:05,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 14:38:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 14:38:05,012 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:05,012 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 76 states. [2018-10-04 14:38:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:05,275 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2018-10-04 14:38:05,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 14:38:05,276 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 224 [2018-10-04 14:38:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:05,276 INFO L225 Difference]: With dead ends: 231 [2018-10-04 14:38:05,276 INFO L226 Difference]: Without dead ends: 227 [2018-10-04 14:38:05,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 74 [2018-10-04 14:38:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-04 14:38:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-04 14:38:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-04 14:38:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-10-04 14:38:05,280 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-10-04 14:38:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:05,280 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-10-04 14:38:05,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 14:38:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-10-04 14:38:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-04 14:38:05,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:05,281 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1] [2018-10-04 14:38:05,281 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:05,281 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1862577491, now seen corresponding path program 48 times [2018-10-04 14:38:05,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:05,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:05,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:05,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:05,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:06,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:06,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:06,236 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:06,384 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2018-10-04 14:38:06,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:06,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:06,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:06,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 14:38:06,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 14:38:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 14:38:06,778 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:06,778 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 77 states. [2018-10-04 14:38:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:07,010 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2018-10-04 14:38:07,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 14:38:07,010 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 224 [2018-10-04 14:38:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:07,010 INFO L225 Difference]: With dead ends: 233 [2018-10-04 14:38:07,011 INFO L226 Difference]: Without dead ends: 229 [2018-10-04 14:38:07,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 75 [2018-10-04 14:38:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-04 14:38:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-10-04 14:38:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-04 14:38:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-10-04 14:38:07,014 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 224 [2018-10-04 14:38:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:07,015 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-10-04 14:38:07,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 14:38:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-10-04 14:38:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-04 14:38:07,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:07,016 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1] [2018-10-04 14:38:07,016 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:07,016 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1363129353, now seen corresponding path program 74 times [2018-10-04 14:38:07,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:07,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:07,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:07,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:07,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 75 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:07,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:07,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:07,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:07,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:07,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:07,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 75 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:08,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:08,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 14:38:08,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 14:38:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 14:38:08,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:08,366 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 77 states. [2018-10-04 14:38:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:08,577 INFO L93 Difference]: Finished difference Result 234 states and 239 transitions. [2018-10-04 14:38:08,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 14:38:08,577 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 227 [2018-10-04 14:38:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:08,578 INFO L225 Difference]: With dead ends: 234 [2018-10-04 14:38:08,578 INFO L226 Difference]: Without dead ends: 230 [2018-10-04 14:38:08,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 75 [2018-10-04 14:38:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-04 14:38:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-10-04 14:38:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-04 14:38:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-10-04 14:38:08,581 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 227 [2018-10-04 14:38:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:08,581 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-10-04 14:38:08,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 14:38:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-10-04 14:38:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-04 14:38:08,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:08,582 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1] [2018-10-04 14:38:08,582 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:08,582 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1363129415, now seen corresponding path program 49 times [2018-10-04 14:38:08,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:08,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:08,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:08,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:08,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:09,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:09,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:09,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:09,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:10,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:10,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 14:38:10,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 14:38:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 14:38:10,297 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:10,297 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 78 states. [2018-10-04 14:38:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:10,529 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2018-10-04 14:38:10,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 14:38:10,529 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 227 [2018-10-04 14:38:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:10,530 INFO L225 Difference]: With dead ends: 236 [2018-10-04 14:38:10,530 INFO L226 Difference]: Without dead ends: 232 [2018-10-04 14:38:10,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 76 [2018-10-04 14:38:10,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-10-04 14:38:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-10-04 14:38:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-04 14:38:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2018-10-04 14:38:10,534 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 227 [2018-10-04 14:38:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:10,534 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2018-10-04 14:38:10,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 14:38:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2018-10-04 14:38:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-04 14:38:10,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:10,535 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1] [2018-10-04 14:38:10,535 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:10,535 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:10,535 INFO L82 PathProgramCache]: Analyzing trace with hash 72210581, now seen corresponding path program 75 times [2018-10-04 14:38:10,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:10,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:10,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:10,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:10,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 76 proven. 8550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:11,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:11,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:38:11,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:11,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-10-04 14:38:11,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:11,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:38:14,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:14,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-04 14:38:14,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-10-04 14:38:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-10-04 14:38:14,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:14,602 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand 155 states. Received shutdown request... [2018-10-04 14:38:20,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-10-04 14:38:20,013 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:38:20,019 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:38:20,020 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:38:20 BoogieIcfgContainer [2018-10-04 14:38:20,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:38:20,021 INFO L168 Benchmark]: Toolchain (without parser) took 237707.83 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -94.4 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 277.9 MB). Peak memory consumption was 183.5 MB. Max. memory is 7.1 GB. [2018-10-04 14:38:20,022 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:38:20,023 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:38:20,024 INFO L168 Benchmark]: Boogie Preprocessor took 21.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:38:20,024 INFO L168 Benchmark]: RCFGBuilder took 265.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 14:38:20,025 INFO L168 Benchmark]: TraceAbstraction took 237372.75 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -94.4 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.7 MB). Peak memory consumption was 162.4 MB. Max. memory is 7.1 GB. [2018-10-04 14:38:20,027 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 265.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237372.75 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -94.4 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.7 MB). Peak memory consumption was 162.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was constructing difference of abstraction (232states) and FLOYD_HOARE automaton (currently 141 states, 155 states before enhancement), while ReachableStatesComputation was computing reachable states (208 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 237.3s OverallTime, 126 OverallIterations, 76 TraceHistogramMax, 85.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 727 SDtfs, 2997 SDslu, 12828 SDs, 0 SdLazy, 14238 SolverSat, 1383 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21572 GetRequests, 13586 SyntacticMatches, 0 SemanticMatches, 7986 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 193.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=232occurred in iteration=125, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 125 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 8.5s SatisfiabilityAnalysisTime, 136.2s InterpolantComputationTime, 29399 NumberOfCodeBlocks, 29399 NumberOfCodeBlocksAsserted, 2709 NumberOfCheckSat, 29149 ConstructedInterpolants, 0 QuantifiedInterpolants, 13429459 SizeOfPredicates, 0 NumberOfNonLiveVariables, 34828 ConjunctsInSsa, 5016 ConjunctsInUnsatCore, 250 InterpolantComputations, 2 PerfectInterpolantSequences, 4816/733209 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-38-20-037.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-38-20-037.csv Completed graceful shutdown