java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:33:08,967 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:33:08,972 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:33:08,987 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:33:08,988 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:33:08,989 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:33:08,990 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:33:08,992 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:33:08,994 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:33:08,994 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:33:08,995 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:33:08,996 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:33:08,997 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:33:08,998 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:33:08,999 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:33:09,000 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:33:09,000 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:33:09,002 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:33:09,007 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:33:09,012 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:33:09,013 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:33:09,014 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:33:09,020 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 10:33:09,037 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:33:09,062 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:33:09,063 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:33:09,064 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:33:09,064 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:33:09,065 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:33:09,065 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:33:09,065 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:33:09,067 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:33:09,067 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:33:09,067 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:33:09,067 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:33:09,067 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:33:09,068 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:33:09,068 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:33:09,068 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:33:09,068 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:33:09,070 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:33:09,070 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:33:09,070 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:33:09,071 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:33:09,071 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:33:09,071 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:33:09,071 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:33:09,072 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:33:09,072 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:33:09,072 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:33:09,073 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:33:09,073 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:33:09,073 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:33:09,073 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:33:09,137 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:33:09,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:33:09,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:33:09,160 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:33:09,160 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:33:09,161 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-30 10:33:09,161 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-30 10:33:09,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:33:09,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:33:09,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:33:09,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:33:09,222 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:33:09,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,264 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:33:09,264 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:33:09,264 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:33:09,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:33:09,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:33:09,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:33:09,268 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:33:09,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... [2018-09-30 10:33:09,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:33:09,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:33:09,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:33:09,294 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:33:09,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:33:09,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 10:33:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:33:09,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:33:09,645 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:33:09,646 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:33:09 BoogieIcfgContainer [2018-09-30 10:33:09,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:33:09,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:33:09,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:33:09,654 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:33:09,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:09" (1/2) ... [2018-09-30 10:33:09,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f09f57a and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:33:09, skipping insertion in model container [2018-09-30 10:33:09,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:33:09" (2/2) ... [2018-09-30 10:33:09,657 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-30 10:33:09,666 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:33:09,673 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:33:09,717 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:33:09,718 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:33:09,718 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:33:09,718 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:33:09,719 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:33:09,719 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:33:09,719 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:33:09,719 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:33:09,719 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:33:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 10:33:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:33:09,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:09,748 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:33:09,749 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:09,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-30 10:33:09,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:09,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:09,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:09,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:09,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:09,892 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:33:09,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:33:09,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:33:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:33:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:33:09,911 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 10:33:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:09,992 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-30 10:33:09,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:33:09,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:33:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:10,015 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:33:10,015 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:33:10,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:33:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:33:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-30 10:33:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:33:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-30 10:33:10,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-30 10:33:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:10,070 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-30 10:33:10,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:33:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-30 10:33:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:33:10,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:10,071 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:33:10,072 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:10,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-30 10:33:10,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:10,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:10,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:10,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:10,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:10,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:10,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:10,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:33:10,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:33:10,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:33:10,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:33:10,274 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-30 10:33:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:10,420 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-30 10:33:10,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:33:10,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 10:33:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:10,422 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:33:10,422 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:33:10,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:33:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:33:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-30 10:33:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:33:10,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 10:33:10,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 10:33:10,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:10,434 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 10:33:10,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:33:10,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 10:33:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:33:10,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:10,438 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:33:10,439 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:10,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-30 10:33:10,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:10,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:10,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:10,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:10,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 10:33:10,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:10,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:10,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:33:10,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:33:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:33:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:33:10,627 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-30 10:33:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:10,688 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-30 10:33:10,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:33:10,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 10:33:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:10,689 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:33:10,689 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:33:10,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:33:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:33:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-30 10:33:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:33:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 10:33:10,693 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 10:33:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:10,693 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 10:33:10,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:33:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 10:33:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:33:10,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:10,695 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-30 10:33:10,695 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:10,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:10,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-30 10:33:10,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:10,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:10,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:10,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:10,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:10,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:10,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:10,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:10,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:10,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:33:10,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:33:10,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:33:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:10,817 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-30 10:33:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:10,881 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-30 10:33:10,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:33:10,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 10:33:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:10,883 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:33:10,883 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:33:10,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:33:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-30 10:33:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:33:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 10:33:10,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 10:33:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:10,887 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 10:33:10,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:33:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 10:33:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:33:10,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:10,889 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 10:33:10,889 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:10,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-30 10:33:10,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:10,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:10,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:10,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:10,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:11,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:11,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:11,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:33:11,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:33:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:33:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:11,046 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-30 10:33:11,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:11,187 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-30 10:33:11,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:33:11,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 10:33:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:11,188 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:33:11,188 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:33:11,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:33:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-30 10:33:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:33:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 10:33:11,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 10:33:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:11,194 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 10:33:11,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:33:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 10:33:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:33:11,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:11,195 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 10:33:11,195 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:11,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-30 10:33:11,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:11,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:11,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:11,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:11,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:11,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:11,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:11,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:11,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:11,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:11,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:33:11,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:33:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:33:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:11,379 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-30 10:33:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:11,436 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-30 10:33:11,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:33:11,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 10:33:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:11,439 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:33:11,440 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:33:11,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:33:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-30 10:33:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:33:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 10:33:11,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-30 10:33:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:11,445 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 10:33:11,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:33:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 10:33:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:33:11,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:11,446 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-30 10:33:11,446 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:11,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:11,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-30 10:33:11,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:11,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:11,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:11,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:11,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:11,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:11,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:11,516 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:11,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:11,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:11,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:33:11,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:33:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:33:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:11,543 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-30 10:33:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:11,582 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-30 10:33:11,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:33:11,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 10:33:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:11,584 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:33:11,584 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:33:11,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:33:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-30 10:33:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:33:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 10:33:11,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 10:33:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:11,590 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 10:33:11,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:33:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 10:33:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:11,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:11,591 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-30 10:33:11,591 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:11,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-30 10:33:11,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:11,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:11,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:11,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:11,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:11,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:11,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:11,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:33:11,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:11,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:11,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:33:11,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:11,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:11,788 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-30 10:33:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:11,859 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-30 10:33:11,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:11,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:33:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:11,860 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:33:11,860 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:33:11,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:33:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 10:33:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:33:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:33:11,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 10:33:11,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:11,867 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:33:11,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:33:11,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:11,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:11,868 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:33:11,869 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:11,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-30 10:33:11,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:11,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:11,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:11,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:11,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:11,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:11,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:11,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:33:11,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:11,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:11,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:33:11,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:12,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:12,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,000 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 10:33:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:12,057 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-30 10:33:12,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:12,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:33:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:12,058 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:33:12,059 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:33:12,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:33:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-30 10:33:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:33:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 10:33:12,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 10:33:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:12,064 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 10:33:12,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 10:33:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:12,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:12,065 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:33:12,066 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:12,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-30 10:33:12,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:12,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:12,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:12,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:12,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:12,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:12,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:12,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:12,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:12,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:33:12,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:12,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:12,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,182 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-30 10:33:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:12,217 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-30 10:33:12,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:12,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:33:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:12,218 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:33:12,219 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:33:12,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:33:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 10:33:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:33:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:33:12,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 10:33:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:12,226 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:33:12,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:33:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:12,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:12,227 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:33:12,227 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:12,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:12,228 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-30 10:33:12,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:12,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:12,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:12,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:12,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:12,341 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:12,405 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:33:12,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:12,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:12,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:33:12,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,462 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 10:33:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:12,652 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-30 10:33:12,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:12,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:33:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:12,654 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:33:12,654 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:33:12,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:33:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-30 10:33:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:33:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 10:33:12,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 10:33:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:12,659 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 10:33:12,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 10:33:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:12,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:12,660 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:33:12,660 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:12,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:12,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-30 10:33:12,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:12,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:12,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:12,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:12,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:12,715 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:12,721 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:33:12,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:12,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:12,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:33:12,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,750 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-30 10:33:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:12,790 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 10:33:12,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:12,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:33:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:12,791 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:33:12,791 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:33:12,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:33:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-30 10:33:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:33:12,798 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-30 10:33:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:12,798 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:33:12,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:33:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:12,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:12,799 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:33:12,799 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:12,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:12,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-30 10:33:12,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:12,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:12,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:12,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:12,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:12,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:12,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:12,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:12,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:33:12,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,911 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-30 10:33:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:12,951 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 10:33:12,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:12,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:33:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:12,953 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:33:12,953 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:33:12,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:33:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-30 10:33:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:33:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:33:12,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 10:33:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:12,960 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:33:12,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:33:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:12,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:12,961 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:33:12,961 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:12,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-30 10:33:12,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:12,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:12,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:12,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:13,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:13,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:13,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:13,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:13,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:13,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:33:13,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:13,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:13,070 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 10:33:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:13,120 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-30 10:33:13,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:13,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:33:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:13,123 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:33:13,124 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:33:13,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:33:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-30 10:33:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:33:13,130 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-30 10:33:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:13,130 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:33:13,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:33:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:13,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:13,131 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-30 10:33:13,132 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:13,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:13,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-30 10:33:13,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:13,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:13,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:13,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:13,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:13,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:13,379 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:33:13,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:13,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:13,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:33:13,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:13,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:13,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:13,405 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-30 10:33:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:13,466 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-30 10:33:13,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:13,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:33:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:13,468 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:33:13,468 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:33:13,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:33:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-30 10:33:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:33:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 10:33:13,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 10:33:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:13,473 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 10:33:13,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 10:33:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:13,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:13,474 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-30 10:33:13,475 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:13,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-30 10:33:13,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:13,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:13,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:13,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:13,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:13,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:13,645 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:13,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:13,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:13,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:13,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:13,683 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-30 10:33:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:13,758 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:33:13,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:13,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:13,759 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:33:13,760 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:33:13,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:33:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 10:33:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:13,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:33:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:13,768 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:13,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:13,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:13,769 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:33:13,769 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:13,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-30 10:33:13,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:13,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:13,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:13,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:13,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:13,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:13,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:33:13,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:13,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:13,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:13,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:13,906 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:33:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:13,955 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:33:13,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:13,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:13,956 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:33:13,956 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:33:13,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:33:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-30 10:33:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:33:13,963 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 10:33:13,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:13,963 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:33:13,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:33:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:13,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:13,964 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:33:13,964 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:13,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-30 10:33:13,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:13,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:13,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:13,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:14,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:14,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:14,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:14,088 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:14,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:14,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:14,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:14,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:14,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:14,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:14,115 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 10:33:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:14,171 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 10:33:14,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:14,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:14,172 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:33:14,172 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:33:14,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:33:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-30 10:33:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:14,180 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:33:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:14,181 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:14,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:14,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:14,182 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:33:14,182 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:14,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:14,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-30 10:33:14,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:14,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:14,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:14,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:14,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:14,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:14,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:14,304 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:14,317 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 10:33:14,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:14,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:14,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:14,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:14,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:14,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:14,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:14,344 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:33:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:14,527 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-30 10:33:14,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:14,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:14,529 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:33:14,529 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:33:14,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:33:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-30 10:33:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:33:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:33:14,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 10:33:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:14,536 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:33:14,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:33:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:14,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:14,537 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:33:14,537 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:14,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-30 10:33:14,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:14,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:14,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:14,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:14,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:14,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:14,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:14,708 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:14,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 10:33:14,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:14,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:14,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:14,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:14,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:14,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:14,753 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-30 10:33:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:14,901 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:33:14,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:14,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:14,902 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:33:14,902 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:33:14,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:33:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 10:33:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:14,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:33:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:14,913 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:14,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:14,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:14,914 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:33:14,914 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:14,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-30 10:33:14,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:14,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:14,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:14,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:14,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:14,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:14,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:14,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:15,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:15,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:15,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:15,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:15,041 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:33:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:15,261 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:33:15,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:15,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:15,262 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:33:15,262 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:33:15,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:33:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-30 10:33:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:33:15,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 10:33:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:15,274 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:33:15,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:33:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:15,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:15,276 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:33:15,277 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:15,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-30 10:33:15,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:15,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:15,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:15,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:15,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:15,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:15,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:15,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:15,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:15,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:15,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:15,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:15,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:15,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:15,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:15,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:15,537 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 10:33:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:15,593 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 10:33:15,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:15,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:15,596 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:33:15,596 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:33:15,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:33:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-30 10:33:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:15,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:33:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:15,603 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:15,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:15,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:15,604 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:33:15,604 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:15,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-30 10:33:15,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:15,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:15,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:15,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:15,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:15,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:15,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:15,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:15,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:33:15,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:15,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:15,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:15,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:15,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:15,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:15,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:15,743 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:33:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:15,930 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-30 10:33:15,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:15,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:15,931 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:33:15,931 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:33:15,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:33:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-30 10:33:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:33:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:33:15,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 10:33:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:15,939 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:33:15,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:33:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:15,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:15,940 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:33:15,940 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:15,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-30 10:33:15,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:15,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:15,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:15,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:15,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:16,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:16,409 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:16,423 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:16,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:16,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:16,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:16,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:16,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:16,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:16,449 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-30 10:33:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:16,497 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:16,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:16,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:16,498 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:16,498 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:16,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 10:33:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:16,508 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 10:33:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:16,509 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:16,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:16,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:16,509 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:33:16,510 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:16,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:16,510 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-30 10:33:16,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:16,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:16,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:16,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:16,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:16,569 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:16,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 10:33:16,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:16,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:16,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:16,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:16,607 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 10:33:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:16,709 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:33:16,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:16,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:16,710 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:33:16,710 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:33:16,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:33:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-30 10:33:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:16,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:33:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:16,720 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:16,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:16,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:16,721 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:33:16,721 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:16,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-30 10:33:16,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:16,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:16,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:16,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:16,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:16,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:16,803 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 10:33:16,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:16,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:16,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:16,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:16,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:16,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:16,832 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:33:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:16,910 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:16,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:16,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:16,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:16,911 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:16,911 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:16,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 10:33:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:16,922 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 10:33:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:16,922 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:16,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:16,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:16,923 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:33:16,924 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:16,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-30 10:33:16,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:16,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:16,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:16,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:17,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:17,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:17,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:17,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:17,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:17,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,055 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 10:33:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:17,153 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:33:17,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:17,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:17,154 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:33:17,154 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:33:17,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:33:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-30 10:33:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:33:17,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 10:33:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:17,160 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:33:17,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:33:17,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:17,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:17,161 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:33:17,161 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:17,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-30 10:33:17,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:17,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:17,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:17,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:17,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:17,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:17,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:17,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:17,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:17,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:17,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:17,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,274 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 10:33:17,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:17,304 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 10:33:17,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:17,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:17,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:17,306 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:33:17,306 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:33:17,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:33:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-30 10:33:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:17,318 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 10:33:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:17,318 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:17,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:17,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:17,319 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:33:17,319 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:17,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-30 10:33:17,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:17,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:17,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:17,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:17,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:17,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:17,392 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:33:17,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:17,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:17,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:17,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:17,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:17,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,418 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 10:33:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:17,549 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 10:33:17,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:17,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:17,550 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:33:17,550 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:33:17,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:33:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-30 10:33:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:17,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:33:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:17,559 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:17,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:17,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:17,560 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:33:17,560 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:17,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:17,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-30 10:33:17,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:17,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:17,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:17,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:17,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:17,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:17,614 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:17,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:17,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:17,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:17,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,647 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:33:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:17,707 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:33:17,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:17,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:17,707 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:33:17,708 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:33:17,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:33:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-30 10:33:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:17,715 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 10:33:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:17,716 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:17,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:17,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:17,716 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-30 10:33:17,717 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:17,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-30 10:33:17,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:17,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:17,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:17,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:17,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:17,772 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:17,777 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:17,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:17,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:17,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:33:17,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:17,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,805 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 10:33:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:17,856 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-30 10:33:17,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:17,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:33:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:17,857 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:33:17,857 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:33:17,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:33:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-30 10:33:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:33:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:33:17,865 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 10:33:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:17,865 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:33:17,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:33:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:17,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:17,866 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-30 10:33:17,866 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:17,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-30 10:33:17,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:17,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:17,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:17,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:17,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:17,937 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:18,014 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:33:18,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:18,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:18,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:18,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:18,055 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-30 10:33:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:18,241 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:18,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:18,242 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:18,242 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:18,242 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:18,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:33:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:18,257 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:18,257 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:18,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:18,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:18,258 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:18,258 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:18,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:18,258 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-30 10:33:18,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:18,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:18,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:18,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:18,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:18,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:18,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:18,328 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:33:18,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:18,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:18,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:18,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:18,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:18,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:18,360 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:18,406 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:18,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:18,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:18,407 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:18,407 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:18,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 10:33:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:18,419 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:33:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:18,419 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:18,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:18,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:18,420 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:18,420 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:18,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-30 10:33:18,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:18,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:18,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:18,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:18,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:18,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:18,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:18,505 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:33:18,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:18,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:18,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:18,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:18,536 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:33:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:18,583 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:18,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:18,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:18,584 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:18,584 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:18,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:33:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:18,594 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:18,595 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:18,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:18,595 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:18,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:18,595 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:18,596 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:18,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:18,596 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-30 10:33:18,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:18,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:18,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:18,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:18,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:18,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:18,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:18,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:18,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:18,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:18,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:18,716 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:18,773 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:18,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:18,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:18,774 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:18,774 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:18,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-30 10:33:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:18,784 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 10:33:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:18,785 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:18,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:18,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:18,785 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:18,785 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:18,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:18,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-30 10:33:18,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:18,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:18,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:18,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:18,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:18,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:18,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:18,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:18,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:18,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:19,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:19,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:19,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:19,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,007 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 10:33:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:19,076 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:33:19,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:19,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:19,077 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:33:19,077 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:33:19,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:33:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-30 10:33:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:19,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:19,089 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:19,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:19,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:19,090 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:19,090 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:19,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:19,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-30 10:33:19,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:19,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:19,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:19,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:19,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:33:19,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:19,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:19,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:19,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:19,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,221 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:19,258 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:33:19,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:19,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:19,259 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:33:19,259 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:33:19,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:33:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-30 10:33:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:19,272 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:33:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:19,272 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:19,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:19,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:19,272 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:19,273 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:19,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:19,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-30 10:33:19,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:19,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:19,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:19,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:19,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:19,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:19,377 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:19,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:19,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:19,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:19,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:19,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,405 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:33:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:19,462 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 10:33:19,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:19,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:19,462 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:33:19,463 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:33:19,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:33:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-30 10:33:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:19,477 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:19,477 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:19,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:19,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:19,478 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:19,478 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:19,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-30 10:33:19,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:19,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:19,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:19,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:19,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:19,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:19,564 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:33:19,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:19,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:19,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:19,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:19,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:19,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,597 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:19,640 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-30 10:33:19,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:19,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:19,640 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:33:19,641 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:33:19,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:33:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-30 10:33:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:33:19,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 10:33:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:19,651 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:33:19,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:33:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:19,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:19,651 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:19,652 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:19,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-30 10:33:19,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:19,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:19,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:19,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:19,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:19,811 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:19,822 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:33:19,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:19,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:19,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:19,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:19,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,849 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-30 10:33:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:19,901 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:19,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:19,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:19,902 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:19,902 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:19,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:33:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:19,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:19,919 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:19,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:19,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:19,920 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:19,920 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:19,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-30 10:33:19,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:19,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:19,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:19,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:20,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:20,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:20,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:20,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:20,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:20,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:20,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,104 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:20,154 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:20,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:20,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:20,155 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:20,155 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:20,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 10:33:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:20,170 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:33:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:20,170 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:20,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:20,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:20,171 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:20,171 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:20,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:20,171 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-30 10:33:20,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:20,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:20,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:20,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:20,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:20,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:20,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:20,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:20,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:20,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:20,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,263 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:33:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:20,315 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:20,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:20,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:20,315 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:20,316 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:20,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:33:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:20,339 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:20,340 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:20,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:20,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:20,340 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:20,340 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:20,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-30 10:33:20,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:20,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:20,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:20,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:20,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:20,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:20,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:33:20,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:20,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:20,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:20,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:20,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:20,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,432 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:20,521 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:20,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:20,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:20,522 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:20,522 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:20,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-30 10:33:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:20,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 10:33:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:20,538 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:20,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:20,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:20,539 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:20,539 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:20,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:20,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-30 10:33:20,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:20,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:20,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:20,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:20,718 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:20,724 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:20,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:20,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:20,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:20,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:20,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,748 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 10:33:20,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:20,782 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:33:20,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:20,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:20,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:20,783 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:33:20,783 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:33:20,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:33:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-30 10:33:20,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:20,798 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:20,798 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:20,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:20,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:20,799 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:20,799 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:20,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:20,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-30 10:33:20,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:20,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:20,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:20,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:20,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:20,873 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:20,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:33:20,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:20,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:20,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:20,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,904 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:20,938 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:33:20,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:20,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:20,939 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:33:20,939 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:33:20,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:33:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-30 10:33:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:20,952 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:33:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:20,952 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:20,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:20,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:20,953 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:20,953 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:20,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-30 10:33:20,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:20,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:20,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:20,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:21,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:21,011 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:21,018 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:33:21,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:21,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:21,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:21,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:21,051 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:33:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:21,104 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 10:33:21,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:21,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:21,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:21,105 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:33:21,105 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:33:21,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:33:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-30 10:33:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:21,125 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:21,125 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:21,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:21,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:21,126 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:21,126 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:21,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-30 10:33:21,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:21,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:21,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:21,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:21,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:21,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:21,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:21,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:21,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:21,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:21,216 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:21,258 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-30 10:33:21,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:21,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:21,259 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:33:21,259 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:33:21,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:33:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-30 10:33:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:33:21,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 10:33:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:21,270 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:33:21,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:33:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:21,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:21,271 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:21,271 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:21,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:21,271 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-30 10:33:21,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:21,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:21,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:21,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:21,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:21,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:21,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:21,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:21,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:21,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:21,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:21,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:21,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:21,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:21,372 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-30 10:33:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:21,473 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:21,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:21,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:21,474 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:21,474 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:21,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 10:33:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:21,497 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:33:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:21,497 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:21,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:21,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:21,498 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:21,498 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:21,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-30 10:33:21,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:21,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:21,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:21,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:21,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:22,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:22,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:22,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:33:22,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:22,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:22,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:22,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:22,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:22,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:22,121 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:33:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:22,337 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:22,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:22,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:22,338 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:22,338 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:22,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 10:33:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:22,356 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:22,356 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:22,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:22,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:22,356 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:22,356 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:22,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-30 10:33:22,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:22,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:22,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:22,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:22,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:22,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:22,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:22,418 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:22,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:22,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:22,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:22,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:22,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:22,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:22,442 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:22,494 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:22,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:22,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:22,495 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:22,495 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:22,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 10:33:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:22,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:33:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:22,513 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:22,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:22,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:22,513 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:22,513 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:22,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:22,514 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-30 10:33:22,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:22,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:22,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:22,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:22,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:22,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:22,698 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:22,703 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:33:22,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:22,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:22,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:22,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:22,728 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:33:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:22,798 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:22,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:22,798 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:22,799 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:22,799 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:22,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-30 10:33:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:22,815 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:33:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:22,815 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:22,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:22,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:22,816 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:22,816 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:22,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-30 10:33:22,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:22,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:22,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:22,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:22,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:22,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:22,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:22,880 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:33:22,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:22,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:22,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:22,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:22,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:22,906 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:33:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,068 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:23,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:23,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,068 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:23,069 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:23,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 10:33:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:23,092 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:33:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,092 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:23,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:23,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,093 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:23,093 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-30 10:33:23,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:23,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:23,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:23,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:23,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:23,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,197 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:33:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,272 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:23,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:23,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:23,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,272 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:23,272 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:23,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 10:33:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:23,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,290 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:23,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:23,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,290 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:23,290 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-30 10:33:23,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:23,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:23,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:23,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:23,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:23,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:23,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:23,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:23,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:23,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,390 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,483 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:23,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:23,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,484 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:23,484 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:23,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 10:33:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:23,504 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:33:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,504 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:23,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:23,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,504 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:23,504 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-30 10:33:23,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:23,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:23,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:23,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:23,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:33:23,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:23,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:23,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:23,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,602 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:33:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,666 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:23,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:23,666 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,666 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:23,666 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:23,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-30 10:33:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:23,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 10:33:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,684 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:23,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:23,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,685 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:23,685 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-30 10:33:23,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:23,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:23,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:23,765 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:23,770 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:23,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:23,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:23,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:23,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,795 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 10:33:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,855 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:23,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:23,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,856 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:23,856 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:23,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 10:33:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:23,880 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:33:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,880 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:23,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:23,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,881 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:23,881 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-30 10:33:23,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:23,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:23,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:23,948 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:23,955 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:33:23,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:23,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:23,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:23,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:23,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:23,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:23,982 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:33:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:24,061 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:24,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:24,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:24,061 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:24,062 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:24,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:33:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:24,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:24,091 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:24,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:24,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:24,091 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:24,091 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:24,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-30 10:33:24,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:24,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:24,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:24,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:24,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:24,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:24,192 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:24,200 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:33:24,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:24,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:24,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:24,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:24,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:24,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:24,225 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:24,306 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:24,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:24,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:24,306 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:24,306 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:24,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 10:33:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:24,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:33:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:24,331 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:24,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:24,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:24,331 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:24,332 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:24,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-30 10:33:24,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:24,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:24,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:24,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:24,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:24,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:24,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:24,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:24,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:24,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:24,489 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:33:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:24,635 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:24,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:24,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:24,636 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:24,636 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:24,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-30 10:33:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:24,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:33:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:24,658 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:24,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:24,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:24,658 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:33:24,659 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:24,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-30 10:33:24,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:24,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:24,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:24,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:24,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:24,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:24,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:24,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:24,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:24,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:24,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:24,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:24,749 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:33:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:24,816 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:24,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:24,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:24,817 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:24,817 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:24,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:24,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-30 10:33:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:24,843 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:33:24,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:24,843 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:24,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:24,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:24,844 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:24,844 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:24,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:24,845 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-30 10:33:24,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:24,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:24,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:24,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:24,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:24,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:24,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:24,915 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:33:24,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:24,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:24,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:24,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:24,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:24,945 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:33:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:25,016 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:25,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:25,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:25,016 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:25,017 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:25,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-30 10:33:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:25,043 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:33:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:25,043 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:25,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:25,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:25,044 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:33:25,044 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:25,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:25,044 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-30 10:33:25,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:25,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:25,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:25,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:25,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:25,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:25,163 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:25,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:25,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:25,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:25,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:25,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:25,187 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:33:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:25,237 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:33:25,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:25,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:25,237 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:33:25,237 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:33:25,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:25,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:33:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-30 10:33:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:25,260 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:33:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:25,260 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:25,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:25,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:25,260 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-30 10:33:25,260 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:25,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-30 10:33:25,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:25,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:25,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:25,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:25,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:25,341 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:25,350 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:33:25,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:25,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:25,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:33:25,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:25,376 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:33:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:25,432 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-30 10:33:25,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:25,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:33:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:25,433 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:33:25,433 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:33:25,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:33:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-30 10:33:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:33:25,450 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 10:33:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:25,451 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:33:25,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:33:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:25,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:25,451 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-30 10:33:25,451 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:25,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-30 10:33:25,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:25,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:25,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:25,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:25,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:25,523 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:25,531 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:25,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:25,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:25,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:25,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:25,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:25,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:25,562 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-30 10:33:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:25,652 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:25,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:25,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:25,653 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:25,653 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:25,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:33:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:25,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:25,685 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:25,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:25,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:25,686 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:25,686 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:25,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:25,687 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-30 10:33:25,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:25,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:25,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:25,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:25,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:25,758 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:25,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:25,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:25,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:25,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:25,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:25,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:25,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:25,799 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:25,900 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:25,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:25,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:25,900 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:25,901 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:25,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:33:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:25,930 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:25,931 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:25,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:25,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:25,931 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:25,931 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:25,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:25,932 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-30 10:33:25,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:25,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:25,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:25,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:25,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:25,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:25,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:26,004 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:26,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:26,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:26,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:26,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:26,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:26,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:26,029 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:26,180 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:26,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:26,180 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:26,180 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:26,180 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:26,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:33:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:26,212 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:26,212 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:26,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:26,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:26,213 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:26,213 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:26,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-30 10:33:26,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:26,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:26,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:26,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:26,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:26,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:26,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:26,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:26,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:26,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:26,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:26,439 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:26,525 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:26,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:26,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:26,526 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:26,526 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:26,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-30 10:33:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:26,557 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:33:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:26,557 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:26,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:26,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:26,558 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:26,558 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:26,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:26,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-30 10:33:26,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:26,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:26,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:26,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:26,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:26,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:26,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:26,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:26,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:26,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:26,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:26,695 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:33:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:26,794 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:26,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:26,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:26,795 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:26,795 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:26,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:33:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:26,830 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:26,830 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:26,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:26,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:26,831 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:26,831 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:26,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-30 10:33:26,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:26,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:26,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:26,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:26,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:26,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:26,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:26,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:26,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:26,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:26,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:26,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:26,943 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:27,040 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:27,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:27,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:27,041 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:27,041 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:27,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:33:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:27,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:27,072 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:27,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:27,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:27,072 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:27,073 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:27,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-30 10:33:27,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:27,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:27,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:27,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:27,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:27,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:27,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:27,133 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:27,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:27,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:27,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:27,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:27,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:27,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:27,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:27,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:27,197 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:27,309 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:27,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:27,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:27,310 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:27,310 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:27,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:33:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:27,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:27,343 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:27,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:27,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:27,344 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:27,344 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:27,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:27,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-30 10:33:27,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:27,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:27,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:27,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:27,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:27,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:27,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:27,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:27,802 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:27,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:27,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:27,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:27,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:27,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:27,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:27,827 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:27,897 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:27,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:27,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:27,898 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:27,898 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:27,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:27,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-30 10:33:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:27,926 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 10:33:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:27,926 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:27,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:27,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:27,926 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:27,926 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:27,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-30 10:33:27,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:27,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:27,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:27,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:27,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:28,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:28,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:28,037 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:28,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:28,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:28,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:28,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:28,065 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 10:33:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:28,151 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:28,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:28,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:28,152 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:28,152 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:28,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:33:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:28,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:28,186 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:28,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:28,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:28,187 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:28,187 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:28,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:28,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-30 10:33:28,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:28,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:28,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:28,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:28,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:28,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:28,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:28,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:28,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:28,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:28,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:28,386 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:28,467 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:28,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:28,467 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:28,467 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:28,468 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:28,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 10:33:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:28,503 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:28,503 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:28,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:28,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:28,504 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:28,504 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:28,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-30 10:33:28,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:28,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:28,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:28,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:28,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:28,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:28,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:28,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:28,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:28,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:28,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:28,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:28,603 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:28,702 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:28,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:28,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:28,702 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:28,702 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:28,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:33:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:28,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:28,738 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:28,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:28,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:28,739 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:28,739 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:28,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-30 10:33:28,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:28,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:28,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:28,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:28,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:28,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:28,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:28,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:28,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:28,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:28,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:28,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:28,836 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:28,930 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:28,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:28,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:28,931 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:28,931 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:28,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-30 10:33:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:28,963 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:33:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:28,963 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:28,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:28,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:28,964 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:28,964 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:28,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-30 10:33:28,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:28,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:28,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:28,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:29,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:29,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:29,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:29,048 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:29,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:29,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:29,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:29,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:29,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:29,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:29,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:29,073 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:33:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:29,172 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:29,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:29,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:29,173 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:29,173 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:29,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-30 10:33:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:29,213 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:29,213 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:29,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:29,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:29,214 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:29,214 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:29,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-30 10:33:29,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:29,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:29,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:29,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:29,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:29,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:29,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:29,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:29,405 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:29,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:29,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:29,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:29,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:29,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:29,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:29,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:29,429 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:29,519 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:29,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:29,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:29,520 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:29,520 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:29,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-30 10:33:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:29,553 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:29,553 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:29,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:29,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:29,553 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:29,553 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:29,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:29,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-30 10:33:29,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:29,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:29,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:29,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:29,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:29,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:29,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:29,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:29,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:29,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:29,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:29,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:29,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:29,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:29,832 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:29,895 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:29,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:29,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:29,895 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:29,895 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:29,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-30 10:33:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:29,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:29,932 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:29,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:29,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:29,933 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:29,933 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:29,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-30 10:33:29,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:29,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:29,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:29,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:29,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:30,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:30,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:30,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:30,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:30,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:30,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:30,085 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:30,157 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-30 10:33:30,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:30,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:30,157 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:33:30,157 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:33:30,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:33:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-30 10:33:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:30,184 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 10:33:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:30,184 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:30,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:30,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:30,185 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:30,185 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:30,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-30 10:33:30,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:30,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:30,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:30,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:30,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:30,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:30,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:30,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:30,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:30,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:30,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:30,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:30,305 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-30 10:33:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:30,405 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:30,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:30,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:30,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:30,405 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:30,406 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:30,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:33:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:30,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:30,448 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:30,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:30,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:30,448 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:30,448 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:30,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-30 10:33:30,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:30,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:30,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:30,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:30,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:30,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:30,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:30,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:30,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:30,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:30,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:30,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:30,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:30,542 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:30,659 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:30,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:30,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:30,660 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:30,660 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:30,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:30,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:33:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:30,699 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:30,700 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:30,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:30,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:30,700 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:30,700 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:30,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-30 10:33:30,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:30,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:30,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:30,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:30,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:30,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:30,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:30,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:30,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:30,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:30,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:30,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:30,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:30,791 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:30,898 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:30,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:30,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:30,899 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:30,899 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:30,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:33:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:30,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:30,937 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:30,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:30,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:30,938 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:30,938 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:30,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-30 10:33:30,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:30,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:30,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:30,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:31,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:31,016 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:31,025 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:31,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:31,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:31,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:31,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:31,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:31,050 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:31,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:31,164 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:31,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:31,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:31,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:31,165 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:31,165 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:31,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-30 10:33:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:31,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:33:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:31,203 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:31,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:31,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:31,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:31,203 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:31,204 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:31,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:31,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-30 10:33:31,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:31,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:31,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:31,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:31,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:31,263 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:31,272 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:31,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:31,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:31,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:31,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:31,296 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:33:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:31,410 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:31,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:31,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:31,411 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:31,411 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:31,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:33:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:31,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:31,459 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:31,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:31,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:31,459 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:31,459 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:31,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-30 10:33:31,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:31,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:31,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:31,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:31,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:31,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:31,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:31,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:31,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:31,583 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:31,685 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:31,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:31,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:31,686 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:31,686 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:31,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:33:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:31,725 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:31,726 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:31,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:31,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:31,726 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:31,727 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:31,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:31,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-30 10:33:31,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:31,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:31,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:31,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:31,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:31,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:31,802 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:31,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:31,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:31,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:31,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:31,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:31,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:31,826 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:31,932 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:31,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:31,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:31,933 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:31,933 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:31,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:33:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:31,976 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:31,976 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:31,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:31,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:31,977 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:31,977 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:31,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:31,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-30 10:33:31,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:31,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:31,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:31,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:32,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:32,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:32,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:32,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:32,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:32,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:32,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:32,098 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:32,203 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:32,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:32,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:32,204 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:32,205 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:32,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-30 10:33:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:32,238 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 10:33:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:32,238 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:32,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:32,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:32,239 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:32,239 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:32,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:32,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-30 10:33:32,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:32,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:32,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:32,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:32,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:32,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:32,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:32,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:32,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:32,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:32,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:32,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:32,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:32,331 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 10:33:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:32,425 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:32,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:32,425 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:32,426 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:32,426 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:32,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:33:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:32,473 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:32,474 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:32,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:32,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:32,474 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:32,475 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:32,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:32,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-30 10:33:32,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:32,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:32,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:32,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:32,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:32,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:32,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:32,551 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:32,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:32,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:32,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:32,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:32,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:32,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:32,578 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:32,692 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:32,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:32,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:32,693 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:32,693 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:32,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 10:33:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:32,737 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:32,737 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:32,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:32,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:32,737 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:32,737 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:32,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-30 10:33:32,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:32,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:32,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:32,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:32,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:32,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:32,819 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:32,826 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:32,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:32,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:32,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:32,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:32,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:32,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:32,850 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:32,954 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:32,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:32,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:32,955 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:32,955 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:32,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:33:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:33,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:33,025 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:33,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:33,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:33,025 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:33,026 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:33,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-30 10:33:33,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:33,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:33,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:33,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:33,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:33,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:33,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:33,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:33,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:33,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:33,206 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:33,319 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:33,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:33,320 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:33,320 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:33,320 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:33,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:33,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-30 10:33:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:33,370 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:33:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:33,371 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:33,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:33,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:33,371 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:33,371 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:33,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:33,372 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-30 10:33:33,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:33,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:33,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:33,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:33,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:33,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:33,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:33,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:33,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:33,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:33,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:33,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:33,477 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:33:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:33,570 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:33,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:33,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:33,571 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:33,571 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:33,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-30 10:33:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:33,615 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:33,616 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:33,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:33,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:33,616 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:33,617 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:33,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:33,617 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-30 10:33:33,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:33,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:33,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:33,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:33,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:33,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:33,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:33,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:33,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:33,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:33,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:33,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:33,799 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:33,888 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:33,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:33,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:33,889 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:33,889 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:33,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-30 10:33:33,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:33,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:33,931 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:33,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:33,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:33,931 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:33,932 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:33,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-30 10:33:33,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:33,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:33,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:33,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:33,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:33,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:34,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:34,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:34,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:34,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:34,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:34,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:34,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:34,030 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:34,119 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:33:34,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:34,119 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:34,120 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:33:34,120 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:33:34,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:34,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:33:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-30 10:33:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:34,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:34,169 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:34,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:34,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:34,169 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:34,170 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:34,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:34,170 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-30 10:33:34,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:34,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:34,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:34,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:34,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:34,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:34,277 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:34,286 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:34,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:34,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:34,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:34,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:34,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:34,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:34,310 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:34,392 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-30 10:33:34,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:34,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:34,393 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:33:34,393 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:33:34,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:33:34,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-30 10:33:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:34,424 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 10:33:34,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:34,424 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:34,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:34,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:34,424 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:34,425 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:34,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:34,425 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-30 10:33:34,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:34,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:34,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:34,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:34,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:34,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:34,597 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:34,606 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:34,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:34,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:34,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:34,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:34,630 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-30 10:33:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:34,780 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:33:34,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:34,780 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:34,781 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:33:34,781 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:33:34,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:33:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:33:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:34,831 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:34,831 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:34,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:34,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:34,832 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:34,832 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:34,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:34,832 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-30 10:33:34,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:34,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:34,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:34,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:34,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:34,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:34,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:34,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:34,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:34,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:34,928 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:35,082 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:33:35,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:35,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:35,082 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:33:35,082 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:33:35,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:33:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 10:33:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:35,129 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:35,129 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:35,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:35,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:35,130 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:35,130 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:35,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-30 10:33:35,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:35,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:35,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:35,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:35,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:35,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:35,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:35,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:35,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:35,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:35,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:35,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:35,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:35,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:35,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:35,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:35,248 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:35,404 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:33:35,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:35,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:35,405 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:33:35,405 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:33:35,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:33:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:33:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:35,465 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:35,465 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:35,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:35,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:35,466 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:35,466 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:35,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:35,466 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-30 10:33:35,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:35,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:35,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:35,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:35,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:35,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:35,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:35,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:35,540 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:35,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:35,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:35,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:35,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:35,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:35,566 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:35,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:35,782 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:33:35,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:35,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:35,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:35,783 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:33:35,783 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:33:35,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:33:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 10:33:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:35,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:35,862 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:35,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:35,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:35,863 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:35,863 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:35,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-30 10:33:35,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:35,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:35,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:35,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:35,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:36,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:36,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:36,673 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:36,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:36,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:36,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:36,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:36,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:36,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:36,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:36,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:36,746 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:37,141 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:37,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:37,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:37,142 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:37,142 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:37,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:33:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:37,196 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:37,197 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:37,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:37,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:37,197 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:37,197 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:37,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-30 10:33:37,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:37,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:37,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:37,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:37,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:37,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:37,287 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:37,294 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:37,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:37,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:37,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:37,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:37,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:37,318 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:37,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:37,480 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:37,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:37,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:37,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:37,481 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:37,481 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:37,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:37,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 10:33:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:37,539 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:37,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:37,540 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:37,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:37,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:37,540 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:37,540 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:37,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:37,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-30 10:33:37,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:37,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:37,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:37,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:37,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:37,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:37,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:37,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:37,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:37,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:37,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:37,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:37,689 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:37,844 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:37,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:37,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:37,845 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:37,845 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:37,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:33:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:37,911 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:37,911 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:37,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:37,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:37,912 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:37,912 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:37,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:37,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-30 10:33:37,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:37,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:37,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:37,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:37,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:37,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:37,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:38,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:38,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:38,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:38,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:38,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:38,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:38,027 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:38,178 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:38,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:38,178 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:38,178 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:38,178 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:38,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-30 10:33:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:38,232 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:33:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:38,233 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:38,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:38,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:38,233 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:38,233 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:38,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-30 10:33:38,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:38,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:38,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:38,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:38,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:38,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:38,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:38,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:38,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:38,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:38,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:38,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:38,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:38,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:38,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:38,322 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:33:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:38,486 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:33:38,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:38,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:38,486 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:33:38,486 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:33:38,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:33:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:33:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:38,544 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:38,544 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:38,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:38,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:38,544 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:38,545 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:38,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-30 10:33:38,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:38,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:38,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:38,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:38,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:38,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:38,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:38,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:38,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:38,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:38,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:38,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:38,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:38,648 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:38,876 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:33:38,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:38,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:38,877 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:33:38,877 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:33:38,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:33:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 10:33:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:38,972 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:38,973 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:38,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:38,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:38,973 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:38,974 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:38,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-30 10:33:38,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:38,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:38,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:38,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:39,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:39,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:39,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:39,445 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:39,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:39,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:39,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:39,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:39,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:39,470 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:39,619 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:33:39,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:39,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:39,619 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:33:39,619 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:33:39,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:33:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:33:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:39,678 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:39,678 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:39,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:39,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:39,679 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:39,679 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:39,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:39,679 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-30 10:33:39,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:39,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:39,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:39,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:39,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:39,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:39,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:39,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:39,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:39,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:39,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:39,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:39,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:39,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:39,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:39,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:39,829 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:39,974 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:33:39,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:39,974 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:39,975 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:33:39,975 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:33:39,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:33:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 10:33:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:40,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:40,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:40,029 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:40,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:40,029 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:40,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:40,030 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:40,030 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:40,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:40,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-30 10:33:40,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:40,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:40,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:40,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:40,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:40,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:40,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:40,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:40,210 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:40,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:40,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:40,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:40,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:40,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:40,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:40,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:40,235 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:40,375 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:40,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:40,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:40,375 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:40,375 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:40,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:33:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:40,436 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:40,436 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:40,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:40,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:40,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:40,437 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:40,437 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:40,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-30 10:33:40,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:40,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:40,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:40,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:40,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:40,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:40,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:40,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:40,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:40,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:40,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:40,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:40,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:40,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:40,576 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:40,722 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:40,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:40,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:40,723 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:40,723 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:40,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 10:33:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:40,783 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:40,783 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:40,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:40,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:40,784 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:40,784 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:40,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:40,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-30 10:33:40,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:40,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:40,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:40,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:40,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:41,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:41,561 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 [2018-09-30 10:33:41,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:41,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:41,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:41,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:41,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:41,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:41,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:41,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:41,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:41,640 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:41,797 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:41,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:41,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:41,798 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:41,798 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:41,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:33:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:41,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:41,855 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:41,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:41,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:41,855 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:41,856 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:41,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-30 10:33:41,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:41,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:41,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:41,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:41,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:41,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:41,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:41,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:41,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:41,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:41,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:41,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:41,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:41,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:41,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:41,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:41,968 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:42,092 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:42,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:42,092 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:42,093 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:42,093 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:42,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:42,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-30 10:33:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:33:42,138 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 10:33:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:42,138 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:33:42,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:33:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:42,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:42,138 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:42,138 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:42,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:42,139 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-30 10:33:42,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:42,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:42,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:42,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:42,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:42,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:42,202 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:42,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:42,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:42,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:42,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:42,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:42,225 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 10:33:42,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:42,411 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:42,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:42,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:42,411 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:42,411 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:42,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:33:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:42,479 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:42,479 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:42,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:42,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:42,480 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:42,480 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:42,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-30 10:33:42,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:42,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:42,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:42,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:42,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:42,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:42,552 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:42,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:42,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:42,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:42,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:42,576 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:42,724 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:42,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:42,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:42,726 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:42,726 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:42,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 10:33:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:42,794 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:42,794 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:42,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:42,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:42,795 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:42,795 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:42,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-30 10:33:42,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:42,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:42,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:42,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:42,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:42,853 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:42,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:42,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:42,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:42,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:42,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:42,885 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:43,039 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:43,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:43,039 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:43,040 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:43,040 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:43,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 10:33:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:43,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:43,117 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:43,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:43,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:43,117 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:43,117 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:43,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:43,117 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-30 10:33:43,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:43,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:43,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:43,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:43,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:43,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:43,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:43,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:43,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:43,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:43,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:43,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:43,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:43,209 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:43,341 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:43,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:43,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:43,347 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:43,347 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:43,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 10:33:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:43,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:43,402 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:43,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:43,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:43,403 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:43,403 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:43,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:43,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-30 10:33:43,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:43,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:43,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:43,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:43,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:43,457 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 [2018-09-30 10:33:43,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:43,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:43,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:43,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:43,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:43,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:43,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:43,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:43,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:43,492 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:43,651 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:43,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:43,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:43,652 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:43,652 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:43,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:33:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:43,725 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:43,725 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:43,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:43,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:43,726 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:43,726 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:43,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:43,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-30 10:33:43,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:43,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:43,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:43,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:43,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:43,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:43,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:43,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:43,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:43,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:43,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:43,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:43,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:43,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:43,824 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:43,976 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:43,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:43,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:43,976 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:43,976 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:43,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 10:33:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:44,042 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:44,042 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:44,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:44,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:44,043 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:44,043 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:44,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:44,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-30 10:33:44,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:44,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:44,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:44,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:44,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:44,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:44,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:44,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:44,121 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:44,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:44,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:44,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:44,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:44,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:44,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:44,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:44,146 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:44,285 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:44,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:44,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:44,286 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:44,286 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:44,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 10:33:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:44,355 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:44,355 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:44,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:44,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:44,355 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:44,356 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:44,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-30 10:33:44,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:44,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:44,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:44,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:44,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:44,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:44,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:44,433 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:44,446 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:44,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:44,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:44,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:44,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:44,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:44,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:44,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:44,480 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:44,999 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:44,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:44,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:45,000 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:45,000 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:45,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 10:33:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:45,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:33:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:45,054 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:45,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:45,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:45,055 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:33:45,055 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:45,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:45,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-30 10:33:45,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:45,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:45,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:45,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:45,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:45,105 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 [2018-09-30 10:33:45,114 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:45,122 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:45,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:45,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:45,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:45,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:45,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:45,147 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:33:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:45,275 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:45,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:45,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:45,276 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:45,276 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:45,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 10:33:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:45,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:45,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:45,349 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:45,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:45,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:45,350 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:45,350 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:45,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:45,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-30 10:33:45,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:45,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:45,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:45,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:45,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:45,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:45,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:45,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:45,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:45,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:45,605 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:45,732 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:45,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:45,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:45,733 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:45,733 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:45,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:33:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:45,804 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:45,804 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:45,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:45,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:45,805 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:45,805 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:45,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-30 10:33:45,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:45,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:45,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:45,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:45,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:45,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:45,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:45,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:45,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:45,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:45,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:45,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:45,902 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:46,103 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:46,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:46,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:46,104 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:46,104 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:46,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 10:33:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:46,172 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:46,173 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:46,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:46,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:46,173 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:46,173 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:46,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:46,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-30 10:33:46,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:46,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:46,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:46,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:46,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:46,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:46,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:46,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:33:46,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:46,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:46,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:46,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:46,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:46,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:46,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:46,327 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:46,458 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:33:46,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:46,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:46,459 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:33:46,459 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:33:46,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:33:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 10:33:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:46,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:33:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:46,548 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:46,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:46,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:46,548 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:33:46,549 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:46,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-30 10:33:46,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:46,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:46,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:46,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:46,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:46,854 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 [2018-09-30 10:33:46,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:46,866 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:46,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:46,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:46,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:46,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:46,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:46,889 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:33:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:47,012 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:47,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:47,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:47,013 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:47,013 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:47,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-30 10:33:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:47,082 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:47,082 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:47,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:47,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:47,082 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:47,083 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:47,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-30 10:33:47,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:47,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:47,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:47,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:47,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:47,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:47,142 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 [2018-09-30 10:33:47,151 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:47,159 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:47,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:47,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:47,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:47,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:47,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:47,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:47,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:47,183 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:47,400 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:33:47,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:47,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:47,401 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:33:47,401 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:33:47,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:33:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-30 10:33:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:47,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:33:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:47,486 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:47,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:47,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:47,486 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:33:47,487 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:47,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:47,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-30 10:33:47,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:47,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:47,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:47,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:47,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:47,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:47,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:47,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:47,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:47,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:47,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:47,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:47,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:47,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:47,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:47,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:47,581 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:33:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:47,692 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:33:47,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:47,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:47,692 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:33:47,693 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:33:47,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:33:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-30 10:33:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:47,770 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:33:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:47,770 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:47,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:47,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:47,771 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-30 10:33:47,771 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:47,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-30 10:33:47,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:47,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:47,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:47,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:47,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:47,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:47,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:47,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:47,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:47,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:47,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:47,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:47,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:33:47,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:47,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:47,871 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:33:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:47,999 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-30 10:33:47,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:47,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:33:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:48,000 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:33:48,000 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:33:48,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:33:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-30 10:33:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:33:48,069 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 10:33:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:48,070 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:33:48,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:33:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:48,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:48,070 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-30 10:33:48,071 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:48,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-30 10:33:48,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:48,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:48,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:48,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:48,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:48,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:48,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:48,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:48,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:48,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:48,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:48,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:48,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:48,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:48,312 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-30 10:33:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:48,530 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:33:48,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:48,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:48,531 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:33:48,532 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:33:48,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:33:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:33:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:48,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:48,617 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:48,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:48,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:48,617 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:33:48,618 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:48,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:48,618 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-30 10:33:48,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:48,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:48,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:48,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:48,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:48,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:48,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:48,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:48,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:48,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:48,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:48,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:48,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:48,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:48,757 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:48,964 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:33:48,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:48,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:48,965 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:33:48,965 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:33:48,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:33:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:33:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:49,069 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:33:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:49,069 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:49,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:49,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:49,070 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:33:49,070 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:49,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:49,070 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-30 10:33:49,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:49,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:49,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:49,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:49,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:49,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:49,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:49,151 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:49,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:49,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:49,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:49,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:49,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:49,175 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:33:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:49,387 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:33:49,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:49,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:49,388 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:33:49,388 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:33:49,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:33:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:33:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:49,479 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:49,480 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:49,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:49,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:49,480 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:49,480 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:49,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:49,480 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-30 10:33:49,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:49,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:49,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:49,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:49,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:49,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:49,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:49,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:33:49,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:49,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:49,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:49,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:49,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:49,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:49,592 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:49,782 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:33:49,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:49,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:49,782 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:33:49,782 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:33:49,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:49,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:33:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:33:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:49,868 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:33:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:49,868 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:49,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:49,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:49,868 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:33:49,869 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:49,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-30 10:33:49,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:49,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:49,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:49,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:49,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:49,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:50,001 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:50,007 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:50,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:50,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:50,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:50,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:50,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:50,030 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:33:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:50,235 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:33:50,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:50,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:50,236 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:33:50,236 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:33:50,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:33:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:33:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:50,322 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:50,323 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:50,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:50,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:50,323 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:50,323 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:50,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:50,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-30 10:33:50,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:50,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:50,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:50,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:50,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:50,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:50,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:33:50,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:50,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:50,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:50,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:50,463 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:50,651 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:33:50,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:50,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:50,652 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:33:50,652 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:33:50,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:33:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:33:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:50,736 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:33:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:50,736 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:50,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:50,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:50,736 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:50,736 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:50,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-30 10:33:50,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:50,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:50,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:50,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:50,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:50,805 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:50,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:33:50,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:50,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:50,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:50,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:50,838 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:33:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:51,040 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:51,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:51,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:51,040 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:51,040 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:51,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:33:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:51,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:51,138 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:51,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:51,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:51,138 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:51,139 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:51,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-30 10:33:51,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:51,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:51,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:51,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:51,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:51,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:51,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:51,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:51,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:51,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:51,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:51,274 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:51,456 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:51,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:51,456 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:51,457 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:51,457 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:51,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:51,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-30 10:33:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:51,525 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:33:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:51,525 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:51,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:51,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:51,526 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:33:51,526 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:51,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:51,526 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-30 10:33:51,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:51,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:51,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:51,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:51,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:51,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:51,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:51,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:51,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:51,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:51,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:51,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:51,654 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:33:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:51,871 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:33:51,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:51,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:51,872 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:33:51,872 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:33:51,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:33:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:33:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:51,968 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:51,968 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:51,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:51,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:51,969 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:51,969 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:51,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:51,969 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-30 10:33:51,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:51,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:51,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:51,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:52,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:52,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:52,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:33:52,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:52,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:52,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:52,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:52,070 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:52,286 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:33:52,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:52,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:52,287 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:33:52,287 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:33:52,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:33:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:33:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:52,381 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:33:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:52,381 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:52,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:52,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:52,381 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:52,382 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:52,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:52,382 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-30 10:33:52,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:52,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:52,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:52,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:52,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:52,451 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:52,457 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:52,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:52,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:52,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:52,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:52,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:52,480 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:33:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:52,703 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:33:52,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:52,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:52,703 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:33:52,703 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:33:52,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:33:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:33:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:52,791 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:52,791 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:52,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:52,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:52,791 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:52,791 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:52,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:52,792 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-30 10:33:52,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:52,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:52,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:52,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:52,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:52,879 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:52,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:33:52,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:52,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:52,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:52,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:52,913 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:53,125 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:33:53,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:53,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:53,125 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:33:53,125 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:33:53,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:33:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:33:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:53,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:33:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:53,207 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:53,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:53,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:53,207 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:53,208 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:53,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:53,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-30 10:33:53,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:53,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:53,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:53,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:53,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:53,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:53,301 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:33:53,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:53,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:53,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:53,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:53,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:53,332 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:33:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:53,534 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:33:53,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:53,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:53,535 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:33:53,535 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:33:53,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:33:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:33:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:53,624 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:53,625 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:53,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:53,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:53,625 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:53,625 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:53,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-30 10:33:53,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:53,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:53,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:53,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:54,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:54,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:54,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:54,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:54,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:54,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:54,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:54,185 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:54,570 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:33:54,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:54,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:54,571 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:33:54,571 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:33:54,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:33:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:33:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:54,658 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:33:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:54,658 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:54,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:54,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:54,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:54,659 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:54,659 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:54,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:54,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-30 10:33:54,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:54,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:54,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:54,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:54,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:54,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:54,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:54,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:54,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:54,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:54,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:54,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:54,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:54,773 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:33:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:54,960 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:54,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:54,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:54,961 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:54,961 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:54,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:33:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:55,064 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:55,064 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:55,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:55,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:55,065 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:55,065 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:55,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-30 10:33:55,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:55,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:55,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:55,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:55,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:55,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:55,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:33:55,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:55,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:55,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:55,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:55,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:55,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:55,181 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:55,385 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:55,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:55,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:55,385 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:55,385 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:55,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-30 10:33:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:33:55,459 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 10:33:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:55,459 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:33:55,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:33:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:55,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:55,459 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:33:55,459 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:55,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:55,460 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-30 10:33:55,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:55,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:55,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:55,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:55,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:55,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:55,536 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:55,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:55,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:55,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:55,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:55,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:55,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:55,561 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 10:33:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:55,773 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:55,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:55,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:55,774 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:55,774 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:55,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:33:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:55,870 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:55,870 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:55,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:55,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:55,871 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:55,871 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:55,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-30 10:33:55,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:55,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:55,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:55,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:55,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:55,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:55,963 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:33:55,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:55,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:55,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:55,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:55,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:55,989 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:56,199 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:56,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:56,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:56,200 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:56,200 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:56,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:33:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:56,300 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:33:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:56,301 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:56,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:56,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:56,301 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:56,301 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:56,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:56,301 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-30 10:33:56,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:56,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:56,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:56,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:56,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:56,368 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:56,377 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:33:56,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:56,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:56,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:56,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:56,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:56,402 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:33:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:56,611 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:56,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:56,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:56,617 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:56,617 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:56,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:33:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:56,734 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:56,734 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:56,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:56,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:56,735 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:56,735 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:56,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-30 10:33:56,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:56,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:56,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:56,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:56,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:56,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:56,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:56,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:56,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:56,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:56,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:56,842 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:57,032 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:57,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:57,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:57,032 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:57,032 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:57,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:33:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:33:57,126 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:33:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:57,126 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:33:57,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:33:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:57,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:57,127 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:57,127 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:57,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:57,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-30 10:33:57,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:57,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:57,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:57,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:57,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:57,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:57,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:57,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:57,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:57,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:57,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:57,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:57,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:57,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:57,253 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:33:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:57,462 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:57,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:57,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:57,463 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:57,463 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:57,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:33:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:57,570 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:57,571 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:57,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:57,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:57,571 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:57,571 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:57,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-30 10:33:57,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:57,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:57,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:57,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:57,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:57,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:33:57,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:57,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:57,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:57,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:57,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:57,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:57,778 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:58,003 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:33:58,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:58,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:58,004 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:33:58,004 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:33:58,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:33:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:33:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:58,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:33:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:58,102 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:58,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:58,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:58,103 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:58,103 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:58,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:58,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-30 10:33:58,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:58,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:58,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:58,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:58,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:58,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:58,205 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:58,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:58,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:58,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:58,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:58,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:58,230 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:33:58,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:58,438 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:33:58,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:58,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:58,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:58,439 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:33:58,439 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:33:58,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:33:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:33:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:58,542 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:58,543 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:58,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:58,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:58,543 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:58,543 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:58,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:58,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-30 10:33:58,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:58,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:58,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:58,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:58,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:58,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:58,662 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:33:58,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:58,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:58,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:58,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:58,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:58,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:58,686 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:58,883 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:58,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:58,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:58,883 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:58,883 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:58,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:33:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:33:58,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:33:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:58,975 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:33:58,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:33:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:58,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:58,975 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:33:58,976 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:58,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:58,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-30 10:33:58,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:58,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:58,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:58,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:59,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:59,081 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:59,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:33:59,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:59,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:59,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:59,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:59,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:59,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:59,116 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:33:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:59,313 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:33:59,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:59,313 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:59,314 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:33:59,314 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:33:59,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:33:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:33:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:33:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:33:59,426 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:33:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:59,426 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:33:59,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:33:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:59,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:59,427 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:59,427 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:59,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:59,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-30 10:33:59,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:59,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:59,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:59,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:59,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:59,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:59,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:59,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:33:59,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:59,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:59,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:59,589 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:33:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:59,783 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:33:59,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:59,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:33:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:59,784 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:33:59,784 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:33:59,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:33:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 10:33:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:33:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:33:59,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:33:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:59,903 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:33:59,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:33:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:59,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:59,904 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:33:59,904 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:59,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:59,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-30 10:33:59,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:59,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:59,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:59,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:00,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:00,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:00,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:00,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:00,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:00,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:00,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:00,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:00,131 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:00,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:00,335 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:34:00,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:00,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:00,336 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:34:00,336 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:34:00,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:34:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:34:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:00,443 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:00,444 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:00,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:00,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:00,444 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:00,444 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:00,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-30 10:34:00,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:00,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:00,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:00,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:00,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:00,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:00,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:00,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:00,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:00,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:00,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:00,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:00,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:00,674 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:00,867 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:34:00,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:00,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:00,867 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:34:00,868 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:34:00,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:34:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:34:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:34:00,971 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:34:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:00,971 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:34:00,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:34:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:00,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:00,972 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:00,972 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:00,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:00,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-30 10:34:00,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:00,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:00,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:00,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:00,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:01,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:01,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:01,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:01,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:01,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:01,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:01,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:01,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:01,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:01,074 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:34:01,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:01,262 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:34:01,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:01,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:01,262 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:34:01,262 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:34:01,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:34:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-30 10:34:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:01,377 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:01,377 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:01,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:01,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:01,378 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:01,378 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:01,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:01,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-30 10:34:01,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:01,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:01,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:01,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:01,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:01,453 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:01,464 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:01,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:01,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:01,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:01,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:01,488 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:01,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:01,671 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:34:01,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:01,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:01,671 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:34:01,671 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:34:01,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:34:01,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-30 10:34:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:01,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:01,779 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:01,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:01,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:01,780 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:01,780 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:01,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:01,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-30 10:34:01,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:01,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:01,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:01,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:01,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:01,882 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:01,891 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:01,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:01,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:01,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:01,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:01,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:01,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:01,917 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:02,076 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:34:02,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:02,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:02,077 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:34:02,077 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:34:02,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:34:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-30 10:34:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:02,188 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:02,189 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:02,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:02,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:02,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:02,189 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:02,189 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:02,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-30 10:34:02,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:02,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:02,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:02,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:02,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:02,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:02,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:02,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:02,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:02,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:02,303 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:02,457 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-30 10:34:02,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:02,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:02,458 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:34:02,458 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:34:02,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:34:02,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-30 10:34:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:34:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:34:02,529 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 10:34:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:02,529 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:34:02,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:34:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:02,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:02,530 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:34:02,530 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:02,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-30 10:34:02,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:02,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:02,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:02,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:02,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:02,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:02,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:02,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:02,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:02,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:02,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:02,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:02,645 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-30 10:34:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:02,936 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:02,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:02,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:02,937 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:02,937 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:02,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:34:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:03,062 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:03,062 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:03,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:03,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:03,063 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:03,063 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:03,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-30 10:34:03,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:03,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:03,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:03,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:03,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:03,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:03,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:03,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:03,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:03,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:03,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:03,198 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:03,488 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:03,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:03,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:03,489 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:03,489 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:03,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:34:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:03,655 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:03,655 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:03,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:03,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:03,656 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:03,656 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:03,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-30 10:34:03,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:03,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:03,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:03,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:03,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:03,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:03,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:03,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:03,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:03,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:03,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:03,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:03,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:03,778 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:04,069 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:04,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:04,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:04,069 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:04,069 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:04,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:34:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:04,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:04,181 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:04,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:04,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:04,182 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:04,182 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:04,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:04,182 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-30 10:34:04,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:04,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:04,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:04,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:04,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:04,352 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:04,361 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:04,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:04,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:04,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:04,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:04,387 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:04,643 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:04,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:04,643 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:04,644 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:04,644 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:04,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:34:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:34:04,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:34:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:04,747 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:34:04,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:34:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:04,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:04,747 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:04,747 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:04,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:04,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-30 10:34:04,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:04,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:04,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:04,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:04,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:04,885 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:04,894 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:04,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:04,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:04,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:04,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:04,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:04,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:04,929 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:34:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:05,178 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:05,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:05,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:05,179 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:05,179 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:05,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:34:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:05,294 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:05,294 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:05,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:05,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:05,294 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:05,295 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:05,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-30 10:34:05,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:05,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:05,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:05,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:05,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:05,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:05,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:05,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:05,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:05,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:05,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:05,419 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:05,677 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:05,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:05,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:05,678 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:05,678 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:05,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:34:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:05,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:05,798 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:05,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:05,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:05,798 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:05,798 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:05,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:05,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-30 10:34:05,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:05,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:05,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:05,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:05,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:05,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:05,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:05,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:05,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:05,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:05,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:05,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:05,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:05,908 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:06,152 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:06,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:06,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:06,153 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:06,153 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:06,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:34:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:06,272 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:06,272 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:06,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:06,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:06,273 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:06,273 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:06,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:06,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-30 10:34:06,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:06,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:06,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:06,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:06,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:06,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:06,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:06,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:06,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:06,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:06,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:06,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:06,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:06,431 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:06,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:06,664 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:34:06,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:06,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:06,665 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:34:06,665 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:34:06,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:34:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-30 10:34:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:34:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:34:06,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:34:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:06,757 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:34:06,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:34:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:06,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:06,757 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:06,758 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:06,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:06,758 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-30 10:34:06,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:06,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:06,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:06,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:06,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:06,828 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:06,854 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:06,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:06,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:06,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:06,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:06,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:06,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:06,882 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:34:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:07,175 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:07,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:07,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:07,176 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:07,176 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:07,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:07,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:34:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:07,300 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:07,300 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:07,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:07,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:07,301 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:07,301 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:07,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-30 10:34:07,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:07,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:07,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:07,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:07,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:07,368 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:07,378 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:07,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:07,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:07,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:07,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:07,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:07,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:07,403 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:07,685 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:07,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:07,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:07,685 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:07,686 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:07,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:34:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:07,798 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:07,798 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:07,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:07,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:07,798 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:07,798 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:07,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:07,799 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-30 10:34:07,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:07,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:07,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:07,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:07,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:07,893 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:07,901 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:07,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:07,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:07,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:07,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:07,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:07,927 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:08,209 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:08,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:08,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:08,210 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:08,210 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:08,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:34:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:08,340 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:08,341 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:08,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:08,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:08,341 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:08,341 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:08,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-30 10:34:08,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:08,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:08,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:08,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:08,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:08,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:08,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:08,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:08,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:08,446 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:08,711 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:08,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:08,711 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:08,711 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:08,711 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:08,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:34:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:34:08,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:34:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:08,825 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:34:08,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:34:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:08,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:08,826 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:08,826 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:08,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:08,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-30 10:34:08,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:08,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:08,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:08,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:08,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:08,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:08,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:08,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:08,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:08,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:08,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:08,927 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:34:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:09,190 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:09,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:09,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:09,191 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:09,191 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:09,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:34:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:09,306 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:09,306 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:09,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:09,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:09,307 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:09,307 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:09,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:09,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-30 10:34:09,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:09,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:09,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:09,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:09,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:09,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:09,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:09,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:09,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:09,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:09,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:09,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:09,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:09,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:09,416 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:09,692 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:09,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:09,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:09,692 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:09,692 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:09,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:34:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:09,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:09,804 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:09,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:09,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:09,804 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:09,804 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:09,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:09,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-30 10:34:09,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:09,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:09,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:09,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:09,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:09,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:09,873 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:09,879 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:09,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:09,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:09,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:09,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:09,910 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:10,153 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:10,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:10,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:10,154 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:10,154 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:10,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:34:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:10,277 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:10,277 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:10,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:10,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:10,277 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:10,278 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:10,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-30 10:34:10,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:10,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:10,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:10,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:10,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:10,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:10,427 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:10,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:10,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:10,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:10,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:10,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:10,453 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:10,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:10,953 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:34:10,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:10,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:10,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:10,953 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:34:10,954 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:34:10,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:34:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-30 10:34:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:34:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:34:11,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 10:34:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:11,114 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:34:11,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:34:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:11,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:11,115 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:11,115 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:11,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-30 10:34:11,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:11,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:11,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:11,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:12,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:12,102 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:12,202 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:12,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:12,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:12,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:12,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:12,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:12,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:12,229 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 10:34:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:12,478 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:12,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:12,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:12,479 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:12,479 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:12,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:34:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:12,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:12,616 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:12,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:12,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:12,616 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:12,616 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:12,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-30 10:34:12,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:12,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:12,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:12,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:12,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:12,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:12,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:12,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:12,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:12,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:12,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:12,713 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:12,983 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:12,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:12,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:12,984 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:12,984 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:12,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:34:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:13,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:13,116 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:13,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:13,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:13,117 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:13,117 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:13,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-30 10:34:13,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:13,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:13,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:13,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:13,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:13,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:13,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:13,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:13,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:13,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:13,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:13,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:13,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:13,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:13,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:13,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:13,216 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:13,465 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:34:13,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:13,465 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:13,466 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:34:13,466 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:34:13,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:13,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:34:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:34:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:13,603 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:13,603 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:13,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:13,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:13,603 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:13,603 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:13,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:13,604 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-30 10:34:13,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:13,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:13,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:13,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:13,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:13,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:13,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:13,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:13,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:13,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:13,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:13,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:13,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:13,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:13,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:13,725 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:13,985 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:34:13,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:13,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:13,986 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:34:13,986 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:34:13,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:34:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:34:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:34:14,110 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:34:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:14,110 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:34:14,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:34:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:14,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:14,111 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:14,111 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:14,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-30 10:34:14,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:14,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:14,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:14,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:14,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:14,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:14,187 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:14,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:14,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:14,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:14,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:14,212 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:34:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:14,481 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:14,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:14,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:14,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:14,482 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:14,482 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:14,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:34:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:14,607 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:14,607 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:14,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:14,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:14,607 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:14,608 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:14,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:14,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-30 10:34:14,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:14,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:14,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:14,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:14,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:14,682 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:14,691 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:14,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:14,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:14,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:14,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:14,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:14,717 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:14,979 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:14,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:14,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:14,979 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:14,979 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:14,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:34:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:15,108 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:15,108 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:15,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:15,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:15,109 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:15,109 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:15,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-30 10:34:15,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:15,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:15,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:15,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:15,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:15,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:15,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:15,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:15,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:15,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:15,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:15,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:15,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:15,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:15,254 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:15,490 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:34:15,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:15,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:15,490 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:34:15,491 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:34:15,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:34:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:34:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:15,622 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:15,622 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:15,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:15,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:15,622 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:15,623 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:15,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-30 10:34:15,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:15,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:15,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:15,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:15,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:15,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:15,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:15,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:15,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:15,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:15,741 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:15,972 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:34:15,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:15,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:15,973 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:34:15,973 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:34:15,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:34:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:34:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:34:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:34:16,079 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:34:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:16,079 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:34:16,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:34:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:16,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:16,079 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:16,079 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:16,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-30 10:34:16,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:16,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:16,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:16,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:16,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:16,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:16,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:16,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:16,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:16,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:16,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:16,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:16,184 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:34:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:16,422 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:34:16,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:16,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:16,423 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:34:16,423 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:34:16,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:34:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:34:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:16,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:16,551 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:16,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:16,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:16,551 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:16,551 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:16,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:16,551 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-30 10:34:16,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:16,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:16,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:16,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:16,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:16,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:16,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:16,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:16,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:16,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:16,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:16,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:16,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:16,662 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:16,902 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:34:16,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:16,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:16,903 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:34:16,903 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:34:16,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:34:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 10:34:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:17,028 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:17,028 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:17,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:17,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:17,029 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:17,029 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:17,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-30 10:34:17,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:17,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:17,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:17,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:17,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:17,103 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:17,108 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:17,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:17,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:17,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:17,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:17,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:17,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:17,131 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:17,371 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:34:17,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:17,371 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:17,372 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:34:17,372 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:34:17,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:34:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:34:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:17,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:17,506 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:17,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:17,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:17,507 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:17,507 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:17,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-30 10:34:17,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:17,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:17,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:17,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:17,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:17,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:17,832 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:17,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:17,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:17,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:17,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:17,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:17,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:17,857 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:18,091 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:34:18,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:18,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:18,092 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:34:18,092 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:34:18,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:34:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:34:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:34:18,213 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:34:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:18,213 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:34:18,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:34:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:18,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:18,213 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:18,213 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:18,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:18,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-30 10:34:18,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:18,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:18,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:18,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:18,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:18,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:18,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:18,321 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:18,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:18,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:18,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:18,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:18,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:18,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:18,352 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:34:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:18,593 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:34:18,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:18,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:18,594 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:34:18,594 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:34:18,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:34:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-30 10:34:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:18,723 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:18,724 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:18,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:18,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:18,724 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:18,724 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:18,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:18,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-30 10:34:18,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:18,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:18,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:18,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:18,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:18,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:18,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:18,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:18,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:18,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:18,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:18,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:18,842 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:19,074 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:34:19,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:19,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:19,075 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:34:19,075 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:34:19,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:34:19,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-30 10:34:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:19,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:19,208 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:19,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:19,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:19,208 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:19,208 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:19,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:19,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-30 10:34:19,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:19,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:19,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:19,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:19,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:19,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:19,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:19,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:19,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:19,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:19,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:19,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:19,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:19,306 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:19,531 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:34:19,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:19,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:19,532 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:34:19,532 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:34:19,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:34:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-30 10:34:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:19,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:19,662 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:19,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:19,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:19,662 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:34:19,663 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:19,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:19,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-30 10:34:19,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:19,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:19,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:19,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:19,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:19,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:19,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:19,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:19,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:19,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:19,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:19,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:19,787 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:19,992 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-30 10:34:19,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:19,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:19,993 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:34:19,993 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:34:19,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:34:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-30 10:34:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:34:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:34:20,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 10:34:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:20,080 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:34:20,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:34:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:20,080 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:20,081 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:34:20,081 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:20,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:20,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-30 10:34:20,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:20,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:20,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:20,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:20,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:20,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:20,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:20,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:20,527 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:20,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:20,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:20,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:20,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:20,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:20,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:20,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:20,550 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-30 10:34:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:20,932 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:34:20,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:20,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:20,932 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:20,932 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:20,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 10:34:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:21,097 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:21,097 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:21,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:21,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:21,098 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:21,098 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:21,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-30 10:34:21,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:21,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:21,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:21,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:21,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:21,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:21,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:21,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:21,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:21,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:21,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:21,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:21,229 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:21,600 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:34:21,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:21,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:21,601 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:21,601 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:21,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 10:34:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:21,751 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:21,752 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:21,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:21,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:21,752 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:21,752 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:21,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-30 10:34:21,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:21,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:21,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:21,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:21,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:21,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:21,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:21,821 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:21,831 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:21,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:21,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:21,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:21,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:21,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:21,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:21,863 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:22,234 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:34:22,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:22,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:22,235 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:34:22,235 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:34:22,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:34:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 10:34:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:22,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:22,425 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:22,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:22,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:22,425 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:22,425 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:22,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-30 10:34:22,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:22,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:22,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:22,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:22,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:22,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:22,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:22,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:22,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:22,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:22,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:22,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:22,527 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:22,902 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:34:22,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:22,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:22,908 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:22,908 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:22,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:23,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-30 10:34:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:23,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:23,055 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:23,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:23,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:23,055 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:23,055 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:23,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:23,056 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-30 10:34:23,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:23,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:23,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:23,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:23,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:23,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:23,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:23,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:23,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:23,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:23,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:23,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:23,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:23,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:23,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:23,157 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:23,548 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:34:23,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:23,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:23,549 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:23,549 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:23,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 10:34:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:23,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:23,722 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:23,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:23,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:23,723 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:23,723 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:23,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-30 10:34:23,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:23,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:23,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:23,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:23,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:23,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:23,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:23,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:23,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:23,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:23,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:23,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:23,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:23,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:23,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:23,824 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:24,251 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:34:24,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:24,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:24,251 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:24,251 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:24,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 10:34:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:24,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:24,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:24,401 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:24,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:24,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:24,402 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:24,402 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:24,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:24,402 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-30 10:34:24,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:24,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:24,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:24,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:24,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:24,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:24,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:24,474 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:24,481 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:24,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:24,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:24,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:24,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:24,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:24,504 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:24,877 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:34:24,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:24,877 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:24,878 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:34:24,878 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:34:24,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:34:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 10:34:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:25,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:25,045 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:25,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:25,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:25,046 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:25,046 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:25,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-30 10:34:25,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:25,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:25,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:25,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:25,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:25,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:25,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:25,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:25,134 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:25,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:25,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:25,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:25,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:25,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:25,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:25,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:25,158 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:25,522 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:34:25,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:25,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:25,522 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:25,522 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:25,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-30 10:34:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:34:25,650 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:34:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:25,650 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:34:25,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:34:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:25,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:25,651 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:25,651 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:25,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:25,651 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-30 10:34:25,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:25,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:25,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:25,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:25,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:25,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:25,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:25,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:25,746 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:25,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:25,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:25,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:25,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:25,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:25,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:25,782 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:34:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:26,225 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:34:26,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:26,225 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:26,226 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:26,226 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:26,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 10:34:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:26,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:26,388 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:26,388 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:26,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:26,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:26,388 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:26,388 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:26,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-30 10:34:26,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:26,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:26,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:26,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:26,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:26,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:26,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:26,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:26,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:26,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:26,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:26,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:26,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:26,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:26,486 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:26,886 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:34:26,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:26,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:26,887 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:26,887 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:26,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 10:34:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:27,050 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:27,050 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:27,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:27,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:27,051 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:27,051 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:27,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:27,051 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-30 10:34:27,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:27,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:27,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:27,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:27,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:27,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:27,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:27,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:27,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:27,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:27,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:27,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:27,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:27,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:27,149 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:27,634 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:34:27,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:27,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:27,634 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:27,634 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:27,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 10:34:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:27,790 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:27,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:27,791 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:27,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:27,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:27,791 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:27,791 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:27,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-30 10:34:27,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:27,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:27,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:27,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:27,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:28,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:28,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:28,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:28,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:28,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:28,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:28,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:28,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:28,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:28,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:28,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:28,324 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:28,669 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:34:28,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:28,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:28,670 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:28,670 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:28,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-30 10:34:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:28,816 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:28,816 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:28,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:28,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:28,817 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:28,817 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:28,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:28,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-30 10:34:28,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:28,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:28,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:28,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:28,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:28,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:28,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:28,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:28,911 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:28,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:28,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:28,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:28,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:28,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:28,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:28,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:28,947 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:29,430 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:29,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:29,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:29,431 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:29,431 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:29,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 10:34:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:29,591 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:29,591 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:29,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:29,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:29,591 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:29,591 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:29,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-30 10:34:29,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:29,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:29,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:29,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:29,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:29,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:29,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:29,661 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:29,670 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:29,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:29,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:29,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:29,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:29,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:29,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:29,695 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:30,041 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:30,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:30,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:30,042 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:30,042 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:30,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:30,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:34:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:30,216 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:30,217 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:30,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:30,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:30,217 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:30,217 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:30,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-30 10:34:30,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:30,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:30,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:30,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:30,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:30,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:30,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:30,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:30,358 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:30,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:30,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:30,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:30,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:30,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:30,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:30,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:30,383 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:30,695 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:30,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:30,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:30,695 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:30,695 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:30,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 10:34:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:30,862 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:30,863 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:30,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:30,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:30,863 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:30,863 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:30,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-30 10:34:30,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:30,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:30,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:30,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:30,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:30,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:30,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:30,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:30,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:31,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:31,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:31,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:31,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:31,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:31,008 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:31,319 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:31,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:31,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:31,320 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:31,320 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:31,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 10:34:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:34:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:34:31,454 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:34:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:31,454 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:34:31,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:34:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:31,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:31,454 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:31,454 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:31,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-30 10:34:31,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:31,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:31,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:31,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:31,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:31,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:31,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:31,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:31,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:31,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:31,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:31,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:31,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:31,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:31,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:31,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:31,552 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:34:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:31,958 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:34:31,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:31,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:31,959 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:31,959 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:31,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 10:34:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:32,128 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:32,128 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:32,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:32,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:32,129 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:32,129 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:32,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-30 10:34:32,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:32,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:32,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:32,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:32,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:32,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:32,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:32,212 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:32,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:32,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:32,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:32,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:32,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:32,238 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:32,667 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:34:32,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:32,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:32,668 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:32,668 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:32,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 10:34:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:32,836 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:32,836 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:32,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:32,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:32,837 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:32,837 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:32,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-30 10:34:32,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:32,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:32,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:32,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:32,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:32,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:32,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:32,926 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:32,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:32,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:32,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:32,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:32,950 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:33,396 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:34:33,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:33,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:33,397 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:34:33,397 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:34:33,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:34:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 10:34:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:33,576 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:33,576 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:33,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:33,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:33,576 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:33,576 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:33,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-30 10:34:33,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:33,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:33,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:33,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:33,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:33,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:33,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:33,644 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:33,653 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:33,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:33,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:33,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:33,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:33,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:33,677 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:34,062 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:34:34,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:34,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:34,063 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:34,063 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:34,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:34,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-30 10:34:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:34,233 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:34,233 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:34,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:34,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:34,234 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:34,234 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:34,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-30 10:34:34,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:34,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:34,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:34,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:34,304 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:34,315 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:34,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:34,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:34,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:34,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:34,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:34,340 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:34,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:34,770 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:34:34,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:34,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:34,771 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:34,771 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:34,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 10:34:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:34,946 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:34,946 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:34,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:34,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:34,946 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:34,947 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:34,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:34,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-30 10:34:34,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:34,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:34,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:34,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:35,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:35,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:35,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:35,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:35,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:35,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:35,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:35,048 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:35,492 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:34:35,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:35,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:35,493 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:35,493 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:35,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:35,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 10:34:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:35,679 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:35,679 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:35,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:35,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:35,679 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:35,680 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:35,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:35,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-30 10:34:35,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:35,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:35,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:35,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:35,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:35,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:35,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:35,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:35,848 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:35,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:35,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:35,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:35,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:35,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:35,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:35,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:35,871 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:36,290 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:34:36,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:36,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:36,291 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:34:36,291 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:34:36,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:34:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 10:34:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:36,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:36,471 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:36,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:36,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:36,471 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:36,471 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:36,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-30 10:34:36,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:36,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:36,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:36,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:36,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:36,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:36,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:36,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:36,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:36,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:36,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:36,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:36,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:36,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:36,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:36,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:36,573 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:36,974 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:34:36,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:36,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:36,975 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:36,975 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:36,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:36,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-30 10:34:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:34:37,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:34:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:37,120 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:34:37,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:34:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:37,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:37,120 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:37,120 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:37,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-30 10:34:37,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:37,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:37,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:37,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:37,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:37,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:37,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:37,198 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:37,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:37,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:37,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:37,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:37,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:37,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:37,221 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:34:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:37,614 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:34:37,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:37,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:37,615 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:37,615 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:37,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 10:34:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:37,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:37,807 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:37,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:37,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:37,807 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:37,807 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:37,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-30 10:34:37,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:37,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:37,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:37,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:37,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:37,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:37,879 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:37,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:37,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:37,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:37,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:37,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:37,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:37,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:37,914 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:38,299 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:34:38,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:38,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:38,299 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:38,299 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:38,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 10:34:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:38,486 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:38,486 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:38,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:38,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:38,486 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:38,487 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:38,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-30 10:34:38,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:38,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:38,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:38,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:38,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:38,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:38,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:38,616 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:38,627 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:38,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:38,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:38,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:38,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:38,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:38,651 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:39,037 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:34:39,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:39,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:39,038 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:39,038 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:39,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 10:34:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:39,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:39,229 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:39,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:39,229 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:39,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:39,229 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:39,229 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:39,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-30 10:34:39,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:39,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:39,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:39,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:39,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:39,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:39,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:39,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:39,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:39,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:39,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:39,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:39,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:39,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:39,331 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:39,724 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:34:39,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:39,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:39,724 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:39,724 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:39,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:39,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-30 10:34:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:39,902 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:39,902 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:39,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:39,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:39,902 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:39,902 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:39,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:39,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-30 10:34:39,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:39,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:39,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:39,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:39,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:39,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:39,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:39,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:39,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:39,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:39,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:40,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:40,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:40,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:40,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:40,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:40,016 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:40,387 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:40,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:40,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:40,387 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:40,387 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:40,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 10:34:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:40,569 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:40,569 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:40,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:40,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:40,569 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:40,570 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:40,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-30 10:34:40,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:40,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:40,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:40,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:40,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:40,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:40,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:40,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:40,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:40,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:40,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:40,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:40,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:40,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:40,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:40,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:40,885 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:41,251 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:41,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:41,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:41,252 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:41,252 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:41,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:34:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:41,428 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:41,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:41,428 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:41,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:41,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:41,428 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:41,428 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:41,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-30 10:34:41,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:41,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:41,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:41,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:41,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:41,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:41,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:41,499 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:41,504 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:41,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:41,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:41,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:41,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:41,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:41,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:41,538 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:41,894 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:41,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:41,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:41,895 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:41,895 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:41,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 10:34:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:42,091 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:42,091 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:42,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:42,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:42,092 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:34:42,092 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:42,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-30 10:34:42,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:42,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:42,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:42,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:42,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:42,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:42,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:42,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:42,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:42,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:42,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:42,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:42,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:42,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:42,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:42,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:42,212 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:42,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:42,538 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:42,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:42,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:42,539 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:42,539 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:42,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-30 10:34:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:34:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:34:42,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 10:34:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:42,659 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:34:42,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:34:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:42,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:42,659 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:42,659 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:42,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-30 10:34:42,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:42,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:42,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:42,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:42,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:42,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:42,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:42,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:42,738 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:42,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:42,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:42,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:42,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:42,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:42,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:42,762 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 10:34:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:43,157 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:34:43,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:43,157 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:43,158 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:43,158 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:43,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:34:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:43,369 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:43,369 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:43,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:43,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:43,369 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:43,369 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:43,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-30 10:34:43,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:43,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:43,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:43,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:43,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:43,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:43,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:43,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:43,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:43,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:43,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:43,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:43,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:43,482 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:43,883 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:43,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:43,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:43,884 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:43,884 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:43,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:44,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:34:44,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:44,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:44,081 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:44,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:44,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:44,082 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:44,082 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:44,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-30 10:34:44,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:44,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:44,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:44,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:44,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:44,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:44,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:44,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:44,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:44,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:44,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:44,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:44,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:44,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:44,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:44,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:44,180 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:44,594 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:34:44,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:44,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:44,595 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:44,595 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:44,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:34:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:44,798 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:44,798 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:44,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:44,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:44,799 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:44,799 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:44,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-30 10:34:44,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:44,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:44,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:44,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:44,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:44,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:44,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:44,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:44,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:44,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:44,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:44,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:44,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:44,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:44,909 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:45,314 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:45,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:45,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:45,316 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:45,316 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:45,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-30 10:34:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:45,494 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:45,494 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:45,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:45,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:45,494 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:45,495 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:45,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-30 10:34:45,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:45,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:45,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:45,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:45,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:45,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:45,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:45,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:45,573 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:45,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:45,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:45,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:45,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:45,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:45,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:45,609 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:46,107 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:46,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:46,107 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:46,107 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:46,108 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:46,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 10:34:46,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:46,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:46,313 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:46,313 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:46,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:46,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:46,313 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:46,313 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:46,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-30 10:34:46,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:46,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:46,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:46,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:46,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:46,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:46,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:46,406 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:46,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:46,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:46,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:46,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:46,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:46,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:46,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:46,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:46,438 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:46,826 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:46,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:46,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:46,827 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:46,827 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:46,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 10:34:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:47,029 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:47,030 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:47,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:47,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:47,030 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:47,030 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:47,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-30 10:34:47,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:47,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:47,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:47,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:47,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:47,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:47,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:47,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:47,110 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:47,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:47,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:47,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:47,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:47,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:47,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:47,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:47,136 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:47,504 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:47,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:47,504 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:47,504 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:47,504 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:47,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 10:34:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:47,718 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:47,718 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:47,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:47,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:47,718 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:47,718 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:47,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-30 10:34:47,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:47,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:47,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:47,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:47,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:47,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:47,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:47,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:47,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:47,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:47,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:47,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:47,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:47,814 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:48,161 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:48,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:48,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:48,162 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:48,162 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:48,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 10:34:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:34:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:34:48,336 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:34:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:48,336 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:34:48,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:34:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:48,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:48,337 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:48,337 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:48,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-30 10:34:48,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:48,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:48,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:48,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:48,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:48,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:48,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:48,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:48,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:48,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:48,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:48,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:48,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:48,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:48,440 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:34:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:48,902 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:34:48,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:48,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:48,903 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:48,903 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:48,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:34:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:49,146 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:49,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:49,146 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:49,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:49,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:49,146 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:49,146 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:49,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:49,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-30 10:34:49,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:49,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:49,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:49,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:49,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:49,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:49,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:49,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:49,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:49,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:49,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:49,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:49,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:49,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:49,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:49,285 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:50,283 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:50,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:50,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:50,284 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:50,284 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:50,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:34:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:50,529 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:50,529 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:50,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:50,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:50,530 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:50,530 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:50,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-30 10:34:50,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:50,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:50,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:50,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:50,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:50,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:50,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:50,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:50,609 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:50,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:50,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:50,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:50,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:50,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:50,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:50,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:50,633 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:51,069 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:34:51,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:51,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:51,069 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:51,069 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:51,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:34:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:51,283 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:51,283 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:51,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:51,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:51,283 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:51,284 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:51,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-30 10:34:51,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:51,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:51,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:51,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:51,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:51,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:51,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:51,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:51,406 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:51,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:51,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:51,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:51,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:51,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:51,432 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:51,834 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:34:51,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:51,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:51,834 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:51,834 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:51,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-30 10:34:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:52,024 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:52,024 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:52,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:52,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:52,024 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:52,024 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:52,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-30 10:34:52,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:52,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:52,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:52,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:52,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:52,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:52,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:52,094 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:52,103 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:52,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:52,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:52,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:52,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:52,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:52,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:52,133 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:52,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:52,525 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:52,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:52,525 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:52,526 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:52,526 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:52,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 10:34:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:52,730 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:52,730 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:52,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:52,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:52,731 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:52,731 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:52,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-30 10:34:52,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:52,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:52,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:52,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:52,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:52,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:52,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:52,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:52,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:52,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:52,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:52,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:52,830 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:53,227 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:34:53,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:53,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:53,228 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:53,228 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:53,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 10:34:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:53,431 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:53,431 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:53,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:53,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:53,431 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:53,432 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:53,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-30 10:34:53,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:53,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:53,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:53,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:53,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:53,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:53,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:53,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:53,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:53,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:53,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:53,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:53,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:53,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:53,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:53,534 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:53,903 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:53,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:53,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:53,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:53,904 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:53,904 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:53,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 10:34:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:54,113 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:54,113 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:54,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:54,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:54,113 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:34:54,113 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:54,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:54,113 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-30 10:34:54,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:54,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:54,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:54,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:54,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:54,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:54,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:54,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:54,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:54,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:54,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:54,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:54,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:54,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:54,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:54,225 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:54,574 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:54,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:54,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:54,575 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:54,575 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:54,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-30 10:34:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:34:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:34:54,736 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:34:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:54,736 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:34:54,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:34:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:54,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:54,736 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:54,736 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:54,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-30 10:34:54,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:54,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:54,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:54,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:55,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:55,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:55,228 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:55,234 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:55,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:55,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:55,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:55,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:55,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:55,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:55,259 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:34:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:55,624 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:55,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:55,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:55,625 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:55,625 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:55,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 10:34:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:55,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:55,833 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:55,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:55,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:55,833 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:55,833 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:55,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-30 10:34:55,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:55,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:55,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:55,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:55,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:55,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:55,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:55,904 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:55,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:34:55,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:55,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:55,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:55,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:55,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:55,938 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:56,318 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:56,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:56,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:56,318 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:56,318 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:56,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:34:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:56,543 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:56,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:56,543 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:56,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:56,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:56,544 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:56,544 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:56,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:56,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-30 10:34:56,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:56,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:56,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:56,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:56,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:56,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:56,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:56,623 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:56,636 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:34:56,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:56,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:56,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:56,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:56,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:56,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:56,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:56,660 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:57,004 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:57,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:57,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:57,005 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:57,005 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:57,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-30 10:34:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:57,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:57,234 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:57,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:57,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:57,235 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:57,235 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:57,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:57,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-30 10:34:57,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:57,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:57,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:57,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:57,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:57,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:57,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:57,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:57,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:57,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:57,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:57,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:57,339 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:57,739 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:34:57,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:57,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:57,740 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:34:57,740 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:34:57,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:34:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:34:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:34:57,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:34:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:57,951 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:34:57,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:34:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:57,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:57,951 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:34:57,952 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:57,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:57,952 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-30 10:34:57,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:57,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:57,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:57,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:57,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:58,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:58,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:58,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:58,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:58,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:58,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:58,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:58,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:58,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:58,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:58,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:58,074 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:34:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:58,438 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:58,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:58,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:58,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:58,438 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:58,439 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:58,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 10:34:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:34:58,648 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:34:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:58,648 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:34:58,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:34:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:58,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:58,648 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:58,648 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:58,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:58,648 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-30 10:34:58,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:58,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:58,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:58,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:58,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:58,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:58,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:58,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:58,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:34:58,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:58,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:58,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:58,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:58,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:58,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:58,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:58,794 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:34:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:59,255 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:34:59,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:59,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:59,256 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:59,256 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:59,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:34:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:34:59,470 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:34:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:59,470 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:34:59,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:34:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:34:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:34:59,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:59,471 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:34:59,471 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:59,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:59,471 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-30 10:34:59,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:59,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:59,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:59,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:59,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:59,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:59,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:59,542 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:59,547 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:59,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:59,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:59,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:59,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:34:59,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:34:59,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:34:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:59,570 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:34:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:59,926 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:34:59,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:34:59,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:34:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:59,927 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:59,927 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:59,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:34:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:35:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-30 10:35:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:00,139 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:35:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:00,139 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:00,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:00,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:00,139 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:35:00,140 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:00,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:00,140 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-30 10:35:00,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:00,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:00,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:00,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:00,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:00,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:00,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:00,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:00,222 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:35:00,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:00,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:00,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:00,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:00,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:00,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:00,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:00,247 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:35:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:00,601 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:35:00,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:00,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:00,602 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:35:00,602 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:35:00,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:35:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 10:35:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:35:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:35:00,781 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:35:00,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:00,781 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:35:00,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:00,781 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:35:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:00,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:00,781 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:35:00,781 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:00,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:00,782 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-30 10:35:00,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:00,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:00,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:00,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:00,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:00,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:00,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:00,847 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:00,855 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:35:00,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:00,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:00,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:00,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:00,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:00,885 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:35:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:01,227 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:35:01,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:01,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:01,228 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:35:01,228 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:35:01,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:35:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 10:35:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:01,457 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:35:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:01,457 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:01,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:01,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:01,457 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:35:01,457 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:01,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-30 10:35:01,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:01,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:01,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:01,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:01,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:01,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:01,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:01,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:01,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:01,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:01,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:01,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:01,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:01,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:01,564 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:35:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:01,908 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:35:01,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:01,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:01,909 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:35:01,909 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:35:01,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:35:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:35:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:02,116 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:35:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:02,116 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:02,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:02,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:02,117 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:35:02,117 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:02,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-30 10:35:02,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:02,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:02,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:02,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:02,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:02,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:02,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:02,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:02,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:02,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:02,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:02,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:02,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:02,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:02,265 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:35:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:02,669 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:35:02,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:02,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:02,669 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:35:02,670 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:35:02,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:35:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 10:35:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:02,885 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:35:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:02,886 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:02,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:02,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:02,886 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:35:02,886 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:02,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:02,886 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-30 10:35:02,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:02,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:02,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:02,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:02,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:02,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:02,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:02,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:02,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:35:02,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:02,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:02,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:02,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:02,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:02,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:02,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:02,986 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:35:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:03,321 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:35:03,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:03,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:03,322 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:35:03,322 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:35:03,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:35:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 10:35:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:35:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:35:03,524 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:35:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:03,524 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:35:03,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:35:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:03,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:03,525 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:35:03,525 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:03,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-30 10:35:03,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:03,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:03,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:03,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:03,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:03,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:03,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:03,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:03,601 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:03,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:03,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:03,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:03,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:03,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:03,625 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:35:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:03,945 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:35:03,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:03,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:03,946 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:35:03,946 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:35:03,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:35:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-30 10:35:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:04,172 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:35:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:04,172 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:04,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:04,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:04,173 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:35:04,173 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:04,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-30 10:35:04,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:04,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:04,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:04,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:04,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:04,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:04,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:04,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:04,253 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:35:04,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:04,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:04,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:04,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:04,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:04,277 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:35:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:04,590 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:35:04,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:04,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:04,590 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:35:04,590 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:35:04,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:35:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-30 10:35:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:04,801 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:35:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:04,801 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:04,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:04,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:04,802 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:35:04,802 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:04,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-30 10:35:04,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:04,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:04,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:04,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:04,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:04,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:04,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:04,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:04,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:35:04,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:04,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:04,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:04,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:04,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:04,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:04,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:04,901 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:35:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:05,218 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:35:05,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:05,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:05,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:05,219 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:35:05,219 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:35:05,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:35:05,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-30 10:35:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:05,434 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:35:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:05,435 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:05,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:35:05,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:05,435 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-30 10:35:05,436 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:05,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-30 10:35:05,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:05,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:05,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:05,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:05,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:05,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:05,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:05,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:05,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:05,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:05,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:35:05,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:35:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:35:05,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:05,631 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:35:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:05,921 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-30 10:35:05,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:35:05,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:35:05,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:05,922 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:35:05,922 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:35:05,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:35:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:35:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-30 10:35:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:35:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:35:06,053 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 10:35:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:06,053 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:35:06,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:35:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:35:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:06,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:06,054 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-30 10:35:06,054 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:06,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-30 10:35:06,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:06,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:06,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:06,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:06,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:06,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:06,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:06,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:06,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:06,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:06,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:06,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:06,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:06,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:06,176 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-30 10:35:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:06,739 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:35:06,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:06,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:06,740 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:35:06,740 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:35:06,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:35:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 10:35:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:07,019 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:07,020 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:07,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:07,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:07,020 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 10:35:07,021 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:07,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-30 10:35:07,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:07,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:07,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:07,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:07,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:07,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:07,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:07,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:07,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:07,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:07,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:07,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:07,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:07,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:07,164 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:07,726 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:35:07,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:07,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:07,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:07,727 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:35:07,727 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:35:07,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:35:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 10:35:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:07,997 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:07,997 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:07,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:07,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:07,998 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 10:35:07,998 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:07,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-30 10:35:07,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:07,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:07,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:07,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:07,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:08,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:08,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:08,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:08,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:08,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:08,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:08,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:08,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:08,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:08,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:08,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:08,804 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:09,365 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:35:09,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:09,365 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:09,366 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:35:09,366 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:35:09,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:35:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 10:35:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:09,628 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:09,628 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:09,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:09,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:09,628 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:09,628 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:09,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-30 10:35:09,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:09,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:09,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:09,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:09,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:09,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:09,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:09,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:09,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:09,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:09,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:09,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:09,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:09,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:09,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:09,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:09,743 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:10,286 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:35:10,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:10,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:10,286 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:35:10,286 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:35:10,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:35:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 10:35:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:10,540 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:35:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:10,540 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:10,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:10,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:10,540 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 10:35:10,540 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:10,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-30 10:35:10,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:10,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:10,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:10,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:10,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:10,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:10,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:10,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:10,620 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:10,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:10,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:10,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:10,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:10,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:10,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:10,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:10,643 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:35:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:11,250 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:35:11,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:11,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:11,250 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:35:11,250 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:35:11,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:35:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 10:35:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:11,540 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:11,540 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:11,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:11,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:11,541 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:11,541 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:11,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-30 10:35:11,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:11,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:11,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:11,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:11,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:11,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:11,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:11,674 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:11,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:11,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:11,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:11,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:11,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:11,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:11,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:11,710 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:12,295 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:35:12,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:12,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:12,296 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:35:12,296 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:35:12,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:35:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 10:35:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:12,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:12,574 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:12,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:12,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:12,575 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:12,575 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:12,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-30 10:35:12,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:12,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:12,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:12,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:12,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:12,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:12,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:12,652 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:12,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:35:12,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:12,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:12,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:12,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:12,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:12,687 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:13,273 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:35:13,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:13,273 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:13,274 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:35:13,274 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:35:13,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:35:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 10:35:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:13,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:13,552 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:13,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:13,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:13,552 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:13,553 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:13,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-30 10:35:13,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:13,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:13,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:13,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:13,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:13,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:13,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:13,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:13,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:13,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:13,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:13,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:13,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:13,695 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:14,250 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:35:14,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:14,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:14,250 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:35:14,250 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:35:14,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:35:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 10:35:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:35:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:35:14,473 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 10:35:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:14,473 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:35:14,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:35:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:14,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:14,473 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 10:35:14,473 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:14,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-30 10:35:14,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:14,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:14,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:14,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:14,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:14,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:14,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:14,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:14,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:14,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:14,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:14,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:14,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:14,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:14,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:14,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:14,581 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 10:35:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:15,140 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:35:15,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:15,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:15,140 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:35:15,140 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:35:15,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:35:15,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 10:35:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:15,404 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:15,404 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:15,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:15,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:15,405 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:15,405 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:15,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-30 10:35:15,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:15,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:15,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:15,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:15,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:15,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:15,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:15,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:15,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:15,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:15,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:15,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:15,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:15,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:15,528 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:16,062 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:35:16,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:16,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:16,063 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:35:16,063 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:35:16,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:35:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 10:35:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:16,320 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:16,321 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:16,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:16,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:16,321 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:16,321 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:16,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-30 10:35:16,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:16,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:16,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:16,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:16,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:16,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:16,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:16,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:16,404 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:16,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:16,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:16,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:16,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:16,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:16,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:16,437 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:17,004 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:35:17,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:17,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:17,004 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:35:17,005 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:35:17,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:35:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 10:35:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:17,277 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:17,277 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:17,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:17,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:17,278 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:17,278 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:17,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:17,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-30 10:35:17,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:17,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:17,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:17,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:17,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:17,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:17,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:17,383 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:17,397 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:17,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:17,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:17,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:17,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:17,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:17,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:17,421 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:17,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:17,965 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:35:17,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:17,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:17,965 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:35:17,965 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:35:17,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:35:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 10:35:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:18,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:35:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:18,227 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:18,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:18,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:18,227 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:18,228 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:18,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:18,228 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-30 10:35:18,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:18,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:18,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:18,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:18,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:18,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:18,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:18,327 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:18,340 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:35:18,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:18,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:18,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:18,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:18,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:18,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:18,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:18,364 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:35:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:18,888 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:35:18,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:18,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:18,889 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:35:18,889 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:35:18,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:35:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 10:35:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:19,158 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:19,158 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:19,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:19,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:19,159 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:19,159 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:19,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-30 10:35:19,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:19,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:19,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:19,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:19,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:19,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:19,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:19,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:19,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:19,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:19,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:19,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:19,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:19,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:19,268 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:19,783 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:35:19,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:19,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:19,784 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:35:19,784 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:35:19,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:35:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:35:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:20,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:20,053 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:20,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:20,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:20,054 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:20,054 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:20,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:20,054 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-30 10:35:20,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:20,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:20,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:20,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:20,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:20,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:20,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:20,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:20,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:20,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:20,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:20,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:20,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:20,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:20,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:20,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:20,169 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:20,687 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:35:20,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:20,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:20,688 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:35:20,688 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:35:20,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:20,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:35:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 10:35:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:20,955 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:20,956 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:20,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:20,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:20,956 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:20,956 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:20,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-30 10:35:20,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:20,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:20,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:20,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:20,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:21,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:21,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:21,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:21,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:21,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:21,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:21,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:21,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:21,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:21,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:21,062 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:21,548 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:35:21,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:21,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:21,549 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:35:21,549 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:35:21,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:35:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:35:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:35:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:35:21,831 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 10:35:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:21,832 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:35:21,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:35:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:21,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:21,832 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 10:35:21,832 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:21,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:21,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-30 10:35:21,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:21,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:21,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:21,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:21,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:21,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:21,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:21,986 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:21,991 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:21,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:21,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:22,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:22,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:22,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:22,014 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 10:35:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:22,628 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:35:22,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:22,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:22,629 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:35:22,629 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:35:22,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:35:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 10:35:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:22,905 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:22,906 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:22,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:22,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:22,906 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:22,906 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:22,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-30 10:35:22,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:22,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:22,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:22,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:22,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:22,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:22,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:22,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:22,991 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:22,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:22,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:23,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:23,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:23,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:23,015 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:23,621 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:35:23,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:23,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:23,622 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:35:23,622 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:35:23,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:35:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 10:35:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:23,926 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:23,926 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:23,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:23,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:23,926 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:23,926 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:23,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:23,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-30 10:35:23,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:23,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:23,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:23,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:23,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:24,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:24,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:24,407 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:24,416 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:35:24,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:24,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:24,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:24,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:24,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:24,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:24,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:24,440 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:25,034 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:35:25,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:25,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:25,034 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:35:25,034 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:35:25,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:35:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 10:35:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:25,316 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:25,316 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:25,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:25,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:25,316 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:25,317 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:25,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-30 10:35:25,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:25,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:25,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:25,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:25,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:25,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:25,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:25,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:25,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:25,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:25,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:25,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:25,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:25,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:25,425 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:26,013 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:35:26,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:26,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:26,014 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:35:26,014 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:35:26,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:35:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 10:35:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:26,286 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:35:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:26,286 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:26,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:26,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:26,286 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:26,286 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:26,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:26,286 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-30 10:35:26,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:26,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:26,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:26,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:26,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:26,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:26,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:26,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:26,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:26,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:26,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:26,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:26,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:26,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:26,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:26,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:26,397 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:35:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:27,039 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:35:27,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:27,039 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:27,039 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:35:27,040 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:35:27,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:35:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 10:35:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:27,317 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:27,318 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:27,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:27,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:27,318 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:27,318 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:27,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-30 10:35:27,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:27,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:27,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:27,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:27,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:27,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:27,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:27,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:27,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:27,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:27,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:27,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:27,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:27,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:27,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:27,440 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:28,073 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:35:28,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:28,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:28,074 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:35:28,074 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:35:28,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:35:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 10:35:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:28,373 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:28,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:28,373 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:28,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:28,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:28,373 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:28,373 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:28,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:28,374 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-30 10:35:28,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:28,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:28,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:28,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:28,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:28,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:28,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:28,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:28,455 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:28,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:28,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:28,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:28,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:28,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:28,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:28,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:28,478 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:29,067 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:35:29,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:29,067 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:29,068 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:35:29,068 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:35:29,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:35:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 10:35:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:29,357 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:29,357 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:29,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:29,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:29,357 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:29,357 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:29,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-30 10:35:29,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:29,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:29,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:29,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:29,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:29,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:29,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:29,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:29,449 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:29,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:29,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:29,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:29,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:29,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:29,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:29,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:29,473 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:30,046 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:35:30,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:30,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:30,047 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:35:30,047 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:35:30,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:35:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 10:35:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:35:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:35:30,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 10:35:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:30,278 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:35:30,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:35:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:30,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:30,279 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:30,279 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:30,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:30,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-30 10:35:30,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:30,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:30,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:30,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:30,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:30,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:30,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:30,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:30,367 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:35:30,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:30,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:30,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:30,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:30,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:30,392 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 10:35:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:30,976 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:35:30,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:30,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:30,977 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:35:30,977 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:35:30,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:35:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 10:35:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:31,285 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:31,285 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:31,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:31,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:31,286 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:31,286 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:31,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:31,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-30 10:35:31,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:31,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:31,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:31,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:31,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:31,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:31,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:31,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:31,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:31,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:31,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:31,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:31,626 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:32,177 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:35:32,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:32,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:32,177 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:35:32,178 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:35:32,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:35:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 10:35:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:32,453 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:32,454 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:32,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:32,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:32,454 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:32,454 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:32,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:32,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-30 10:35:32,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:32,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:32,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:32,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:32,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:32,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:32,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:32,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:32,540 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:32,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:32,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:32,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:32,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:32,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:32,563 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:33,149 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:35:33,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:33,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:33,149 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:35:33,149 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:35:33,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:35:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 10:35:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:33,440 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:33,440 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:33,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:33,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:33,440 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:33,441 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:33,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-30 10:35:33,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:33,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:33,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:33,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:33,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:33,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:33,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:33,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:33,529 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:33,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:33,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:33,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:33,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:33,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:33,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:33,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:33,564 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:34,248 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:35:34,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:34,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:34,249 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:35:34,249 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:35:34,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:35:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 10:35:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:34,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:35:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:34,506 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:34,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:34,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:34,506 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:34,506 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:34,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-30 10:35:34,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:34,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:34,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:34,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:34,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:34,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:34,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:34,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:34,591 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:34,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:34,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:34,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:34,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:34,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:34,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:34,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:34,616 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:35:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:35,145 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:35:35,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:35,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:35,146 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:35:35,146 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:35:35,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:35:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 10:35:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:35,434 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:35,435 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:35,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:35,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:35,435 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:35,435 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:35,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:35,435 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-30 10:35:35,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:35,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:35,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:35,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:35,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:35,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:35,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:35,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:35,521 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:35,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:35,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:35,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:35,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:35,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:35,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:35,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:35,546 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:36,085 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:35:36,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:36,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:36,086 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:35:36,086 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:35:36,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:35:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:35:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:36,382 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:36,382 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:36,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:36,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:36,382 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:36,382 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:36,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:36,382 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-30 10:35:36,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:36,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:36,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:36,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:36,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:36,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:36,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:36,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:36,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:35:36,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:36,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:36,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:36,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:36,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:36,490 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:36,993 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:35:36,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:36,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:36,994 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:35:36,994 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:35:36,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:35:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 10:35:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:37,284 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:37,284 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:37,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:37,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:37,284 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:37,284 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:37,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:37,285 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-30 10:35:37,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:37,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:37,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:37,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:37,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:37,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:37,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:37,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:37,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:37,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:37,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:37,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:37,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:37,432 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:37,933 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:35:37,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:37,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:37,934 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:35:37,934 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:35:37,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:35:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-30 10:35:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:35:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:35:38,135 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-30 10:35:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:38,135 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:35:38,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:35:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:38,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:38,135 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 10:35:38,135 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:38,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:38,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-30 10:35:38,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:38,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:38,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:38,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:38,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:38,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:38,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:38,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:38,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:38,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:38,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:38,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:38,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:38,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:38,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:38,245 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-30 10:35:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:38,821 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:35:38,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:38,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:38,822 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:35:38,822 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:35:38,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:35:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 10:35:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:39,122 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:39,122 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:39,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:39,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:39,123 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:39,123 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:39,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-30 10:35:39,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:39,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:39,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:39,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:39,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:39,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:39,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:39,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:39,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:39,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:39,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:39,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:39,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:39,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:39,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:39,233 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:39,785 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:35:39,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:39,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:39,786 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:35:39,786 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:35:39,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:35:40,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:35:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:40,097 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:40,098 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:40,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:40,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:40,098 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:40,098 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:40,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-30 10:35:40,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:40,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:40,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:40,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:40,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:40,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:40,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:40,589 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:40,595 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:40,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:40,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:40,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:40,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:40,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:40,628 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:41,326 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:35:41,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:41,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:41,326 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:35:41,326 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:35:41,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:35:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 10:35:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:41,639 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:41,640 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:41,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:41,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:41,640 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:41,640 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:41,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:41,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-30 10:35:41,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:41,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:41,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:41,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:41,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:41,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:41,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:41,719 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:41,729 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:41,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:41,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:41,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:41,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:41,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:41,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:41,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:41,753 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:42,332 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:35:42,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:42,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:42,332 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:35:42,332 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:35:42,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:35:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 10:35:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:42,610 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:35:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:42,610 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:42,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:42,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:42,611 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:42,611 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:42,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-30 10:35:42,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:42,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:42,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:42,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:42,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:42,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:42,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:42,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:42,703 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:35:42,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:42,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:42,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:42,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:42,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:42,728 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:35:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:43,288 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:35:43,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:43,288 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:43,288 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:35:43,288 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:35:43,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:35:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 10:35:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:43,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:43,591 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:43,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:43,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:43,591 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:43,591 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:43,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-30 10:35:43,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:43,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:43,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:43,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:43,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:43,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:43,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:43,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:43,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:43,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:43,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:43,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:43,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:43,697 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:44,218 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:35:44,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:44,218 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:44,218 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:35:44,218 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:35:44,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:35:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 10:35:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:44,617 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:44,617 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:44,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:44,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:44,617 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:44,617 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:44,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:44,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-30 10:35:44,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:44,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:44,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:44,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:44,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:44,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:44,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:44,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:44,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:44,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:44,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:44,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:44,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:44,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:44,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:44,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:44,726 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:45,234 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:35:45,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:45,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:45,235 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:35:45,235 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:35:45,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:35:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:35:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:45,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:45,541 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:45,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:45,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:45,541 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:45,542 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:45,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-30 10:35:45,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:45,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:45,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:45,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:45,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:45,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:45,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:45,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:45,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:45,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:45,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:45,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:45,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:45,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:45,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:45,654 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:46,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:46,141 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:35:46,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:46,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:46,142 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:35:46,142 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:35:46,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:35:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:35:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:35:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:35:46,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 10:35:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:46,397 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:35:46,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:35:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:46,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:46,397 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:46,397 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:46,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:46,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-30 10:35:46,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:46,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:46,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:46,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:46,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:46,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:46,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:46,473 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:46,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:46,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:46,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:46,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:46,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:46,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:46,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:46,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:46,505 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 10:35:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:47,141 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:35:47,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:47,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:47,142 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:35:47,142 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:35:47,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:35:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 10:35:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:47,470 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:47,470 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:47,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:47,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:47,470 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:47,470 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:47,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:47,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-30 10:35:47,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:47,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:47,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:47,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:47,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:47,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:47,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:47,598 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:47,612 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:47,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:47,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:47,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:47,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:47,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:47,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:47,637 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:48,209 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:35:48,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:48,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:48,210 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:35:48,210 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:35:48,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:35:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:35:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:48,516 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:48,517 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:48,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:48,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:48,517 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:48,517 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:48,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-30 10:35:48,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:48,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:48,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:48,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:48,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:48,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:48,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:48,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:48,598 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:35:48,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:48,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:48,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:48,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:48,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:48,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:48,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:48,634 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:49,706 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:35:49,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:49,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:49,707 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:35:49,707 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:35:49,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:35:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 10:35:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:50,013 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:50,014 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:50,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:50,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:50,014 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:50,014 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:50,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:50,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-30 10:35:50,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:50,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:50,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:50,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:50,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:50,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:50,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:50,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:50,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:50,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:50,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:50,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:50,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:50,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:50,136 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:50,706 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:35:50,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:50,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:50,707 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:35:50,707 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:35:50,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:35:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 10:35:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:51,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:35:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:51,097 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:51,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:51,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:51,098 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:51,098 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:51,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:51,098 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-30 10:35:51,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:51,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:51,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:51,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:51,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:51,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:51,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:51,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:51,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:51,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:51,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:51,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:51,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:51,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:51,208 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:35:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:51,731 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:35:51,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:51,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:51,732 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:35:51,732 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:35:51,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:35:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 10:35:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:52,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:52,069 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:52,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:52,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:52,070 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:52,070 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:52,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-30 10:35:52,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:52,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:52,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:52,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:52,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:52,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:52,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:52,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:52,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:52,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:52,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:52,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:52,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:52,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:52,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:52,176 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:52,724 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:35:52,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:52,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:52,724 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:35:52,724 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:35:52,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:35:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 10:35:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:53,054 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:53,054 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:53,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:53,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:53,055 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:53,055 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:53,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:53,055 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-30 10:35:53,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:53,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:53,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:53,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:53,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:53,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:53,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:53,130 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:53,136 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:53,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:53,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:53,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:53,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:53,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:53,160 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:53,707 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:35:53,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:53,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:53,708 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:35:53,708 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:35:53,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:35:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:35:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:54,019 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:54,019 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:54,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:54,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:54,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:54,020 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:54,020 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:54,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:54,020 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-30 10:35:54,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:54,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:54,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:54,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:54,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:54,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:54,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:54,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:54,109 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:54,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:54,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:54,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:54,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:54,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:54,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:54,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:54,133 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:54,630 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:35:54,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:54,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:54,631 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:35:54,631 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:35:54,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:35:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 10:35:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:35:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:35:54,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 10:35:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:54,872 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:35:54,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:35:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:54,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:54,873 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:35:54,873 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:54,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-30 10:35:54,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:54,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:54,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:54,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:54,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:54,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:54,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:54,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:54,962 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:35:54,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:54,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:54,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:54,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:54,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:54,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:54,985 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 10:35:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:55,496 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:35:55,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:55,496 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:55,497 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:35:55,497 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:35:55,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:35:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:35:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:55,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:55,817 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:55,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:55,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:55,818 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:55,818 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:55,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:55,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-30 10:35:55,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:55,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:55,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:55,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:55,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:55,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:55,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:55,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:55,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:55,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:55,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:55,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:55,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:55,925 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:56,459 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:35:56,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:56,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:56,459 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:35:56,459 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:35:56,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:35:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 10:35:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:35:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:35:56,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:35:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:56,774 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:35:56,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:35:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:56,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:56,774 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:56,774 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:56,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-30 10:35:56,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:56,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:56,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:56,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:56,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:56,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:56,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:56,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:56,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:56,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:56,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:56,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:56,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:56,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:56,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:56,879 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:35:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:57,396 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:35:57,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:57,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:57,397 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:35:57,397 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:35:57,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:35:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 10:35:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:57,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:57,737 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:57,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:57,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:57,738 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:57,738 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:57,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-30 10:35:57,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:57,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:57,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:57,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:57,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:57,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:57,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:57,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:57,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:35:57,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:57,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:57,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:57,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:57,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:57,897 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:35:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:58,401 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:35:58,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:58,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:58,401 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:35:58,401 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:35:58,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:35:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:35:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:35:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:35:58,717 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:35:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:58,717 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:35:58,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:35:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:58,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:58,717 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:35:58,717 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:58,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:58,718 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-30 10:35:58,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:58,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:58,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:58,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:58,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:58,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:58,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:58,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:58,801 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:58,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:58,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:58,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:58,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:58,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:58,825 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:35:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:59,369 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:35:59,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:35:59,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:35:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:59,369 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:35:59,369 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:35:59,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:35:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:35:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:35:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:35:59,693 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:35:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:59,693 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:35:59,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:35:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:35:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:35:59,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:59,693 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:35:59,693 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:59,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-30 10:35:59,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:59,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:59,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:59,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:59,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:59,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:59,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:59,769 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:59,779 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:35:59,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:59,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:59,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:59,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:35:59,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:35:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:35:59,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:35:59,804 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:00,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:00,366 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:36:00,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:00,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:00,367 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:36:00,367 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:36:00,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:36:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 10:36:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:00,673 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:00,673 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:00,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:00,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:00,674 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:00,674 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:00,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-30 10:36:00,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:00,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:00,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:00,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:00,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:00,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:00,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:00,745 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:00,760 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:00,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:00,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:00,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:00,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:00,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:00,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:00,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:00,794 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:01,298 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:36:01,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:01,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:01,298 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:36:01,298 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:36:01,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:36:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 10:36:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:01,654 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:01,654 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:01,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:01,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:01,654 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:01,654 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:01,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:01,654 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-30 10:36:01,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:01,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:01,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:01,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:01,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:01,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:01,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:01,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:01,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:01,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:01,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:01,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:01,761 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:02,253 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:36:02,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:02,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:02,254 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:36:02,254 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:36:02,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:36:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:36:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:36:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:36:02,528 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 10:36:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:02,528 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:36:02,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:36:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:02,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:02,529 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:02,529 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:02,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:02,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-30 10:36:02,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:02,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:02,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:02,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:02,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:02,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:02,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:02,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:02,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:02,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:02,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:02,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:02,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:02,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:02,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:02,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:02,630 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 10:36:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:03,074 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:36:03,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:03,074 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:03,074 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:36:03,074 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:36:03,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:36:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 10:36:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:03,406 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:03,406 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:03,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:03,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:03,406 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:03,407 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:03,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-30 10:36:03,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:03,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:03,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:03,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:03,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:03,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:03,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:03,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:03,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:03,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:03,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:03,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:03,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:03,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:03,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:03,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:03,865 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:04,331 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:36:04,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:04,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:04,332 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:36:04,332 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:36:04,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:36:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 10:36:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:04,652 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:04,653 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:04,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:04,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:04,653 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:04,653 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:04,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-30 10:36:04,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:04,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:04,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:04,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:04,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:04,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:04,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:04,733 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:04,740 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:04,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:04,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:04,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:04,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:04,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:04,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:04,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:04,775 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:05,315 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:36:05,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:05,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:05,316 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:36:05,316 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:36:05,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:05,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:36:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 10:36:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:05,639 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:05,640 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:05,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:05,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:05,640 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:05,640 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:05,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:05,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-30 10:36:05,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:05,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:05,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:05,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:05,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:05,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:05,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:05,714 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:05,723 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:05,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:05,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:05,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:05,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:05,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:05,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:05,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:05,747 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:06,210 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:36:06,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:06,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:06,210 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:36:06,210 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:36:06,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:36:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:36:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:36:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:36:06,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:36:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:06,515 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:36:06,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:36:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:06,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:06,516 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:06,516 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:06,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-30 10:36:06,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:06,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:06,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:06,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:06,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:06,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:06,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:06,596 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:06,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:06,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:06,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:06,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:06,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:06,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:06,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:06,635 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:36:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:07,086 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:36:07,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:07,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:07,087 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:36:07,087 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:36:07,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:36:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-30 10:36:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:07,420 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:07,421 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:07,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:07,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:07,421 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:07,421 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:07,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-30 10:36:07,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:07,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:07,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:07,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:07,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:07,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:07,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:07,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:07,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:07,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:07,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:07,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:07,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:07,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:07,533 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:07,972 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:36:07,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:07,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:07,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:07,972 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:36:07,972 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:36:07,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:36:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-30 10:36:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:08,311 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:08,311 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:08,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:08,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:08,311 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:08,311 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:08,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:08,312 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-30 10:36:08,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:08,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:08,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:08,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:08,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:08,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:08,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:08,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:08,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:08,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:08,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:08,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:08,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:08,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:08,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:08,416 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:08,827 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:36:08,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:08,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:08,828 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:36:08,828 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:36:08,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:36:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-30 10:36:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:09,185 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:09,185 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:09,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:09,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:09,186 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:36:09,186 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:09,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:09,186 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-30 10:36:09,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:09,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:09,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:09,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:09,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:09,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:09,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:09,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:09,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:09,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:09,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:09,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:09,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:09,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:09,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:09,300 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:09,693 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-30 10:36:09,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:09,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:09,694 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:36:09,694 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:36:09,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:36:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-30 10:36:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:36:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:36:09,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-30 10:36:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:09,891 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:36:09,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:36:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:09,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:09,891 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 10:36:09,891 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:09,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-30 10:36:09,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:09,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:09,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:09,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:09,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:09,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:09,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:09,993 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:10,022 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:10,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:10,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:10,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:10,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:10,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:10,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:10,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:10,060 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-30 10:36:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:10,992 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:36:10,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:10,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:10,993 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:36:10,993 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:10,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 10:36:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:11,360 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:11,361 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:11,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:11,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:11,361 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:36:11,361 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:11,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-30 10:36:11,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:11,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:11,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:11,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:11,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:11,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:11,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:11,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:11,449 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:11,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:11,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:11,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:11,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:11,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:11,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:11,474 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:12,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:12,255 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:36:12,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:12,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:12,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:12,256 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:36:12,256 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:12,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 10:36:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:12,607 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:12,608 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:12,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:12,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:12,608 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:36:12,608 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:12,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:12,608 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-30 10:36:12,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:12,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:12,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:12,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:12,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:12,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:12,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:12,682 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:12,695 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:12,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:12,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:12,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:12,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:12,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:12,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:12,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:12,718 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:13,456 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:36:13,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:13,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:13,457 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:36:13,457 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:36:13,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:36:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 10:36:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:13,850 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:13,850 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:13,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:13,850 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:13,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:13,850 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:13,850 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:13,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-30 10:36:13,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:13,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:13,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:13,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:13,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:13,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:13,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:13,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:13,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:13,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:13,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:13,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:13,987 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:14,711 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:36:14,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:14,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:14,712 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:14,712 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:36:14,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:36:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 10:36:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:36:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:36:15,049 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:36:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:15,049 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:36:15,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:36:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:15,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:15,049 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:36:15,050 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:15,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-30 10:36:15,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:15,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:15,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:15,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:15,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:15,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:15,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:15,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:15,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:15,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:15,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:15,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:15,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:15,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:15,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:15,159 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:36:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:15,962 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:36:15,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:15,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:15,963 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:36:15,963 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:15,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 10:36:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:16,475 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:16,476 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:16,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:16,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:16,476 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:16,476 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:16,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:16,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-30 10:36:16,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:16,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:16,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:16,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:16,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:16,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:16,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:16,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:16,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:16,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:16,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:16,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:16,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:16,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:16,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:16,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:16,587 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:17,363 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:36:17,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:17,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:17,364 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:36:17,364 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:17,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 10:36:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:17,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:17,740 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:17,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:17,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:17,740 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:17,740 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:17,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-30 10:36:17,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:17,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:17,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:17,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:17,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:17,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:17,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:17,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:17,825 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:17,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:17,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:17,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:17,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:17,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:17,849 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:18,581 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:36:18,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:18,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:18,582 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:36:18,582 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:36:18,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:36:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 10:36:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:18,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:18,940 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:18,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:18,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:18,941 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:18,941 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:18,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-30 10:36:18,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:18,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:18,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:18,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:18,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:19,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:19,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:19,024 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:19,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:19,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:19,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:19,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:19,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:19,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:19,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:19,071 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:19,959 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:36:19,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:19,959 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:19,960 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:19,960 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:36:19,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:36:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 10:36:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:36:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:36:20,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 10:36:20,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:20,266 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:36:20,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:20,266 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:36:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:20,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:20,266 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:36:20,267 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:20,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:20,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-30 10:36:20,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:20,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:20,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:20,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:20,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:20,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:20,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:20,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:20,352 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:20,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:20,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:20,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:20,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:20,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:20,377 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 10:36:21,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:21,105 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:36:21,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:21,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:21,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:21,106 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:21,106 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:36:21,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:36:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 10:36:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:21,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:21,477 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:21,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:21,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:21,477 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:21,477 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:21,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-30 10:36:21,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:21,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:21,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:21,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:21,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:21,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:21,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:21,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:21,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:21,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:21,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:21,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:21,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:21,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:21,593 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:22,257 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:36:22,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:22,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:22,257 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:36:22,257 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:36:22,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:36:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 10:36:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:22,625 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:22,625 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:22,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:22,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:22,626 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:22,626 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:22,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:22,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-30 10:36:22,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:22,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:22,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:22,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:22,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:22,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:22,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:22,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:22,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:22,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:22,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:22,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:22,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:22,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:22,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:22,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:22,731 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:23,441 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:36:23,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:23,441 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:23,441 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:23,441 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:36:23,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:36:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 10:36:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:23,807 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:23,807 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:23,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:23,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:23,807 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:23,808 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:23,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:23,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-30 10:36:23,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:23,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:23,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:23,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:23,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:23,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:23,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:23,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:23,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:23,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:23,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:23,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:23,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:23,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:23,917 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:24,610 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:36:24,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:24,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:24,611 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:36:24,611 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:36:24,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:36:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 10:36:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:36:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:36:24,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:36:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:24,960 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:36:24,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:36:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:24,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:24,960 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:24,961 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:24,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-30 10:36:24,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:24,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:24,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:24,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:24,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:25,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:25,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:25,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:25,051 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:25,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:25,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:25,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:25,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:25,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:25,075 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:36:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:25,740 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:36:25,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:25,740 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:25,741 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:36:25,741 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:36:25,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:36:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 10:36:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:26,112 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:26,113 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:26,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:26,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:26,113 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:26,113 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:26,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-30 10:36:26,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:26,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:26,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:26,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:26,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:26,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:26,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:26,202 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:26,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:26,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:26,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:26,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:26,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:26,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:26,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:26,235 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:26,896 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:36:26,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:26,896 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:26,897 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:36:26,897 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:36:26,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:36:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:36:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:27,267 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:27,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:27,267 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:27,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:27,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:27,268 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:27,268 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:27,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-09-30 10:36:27,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:27,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:27,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:27,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:27,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:27,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:27,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:27,360 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:27,375 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:27,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:27,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:27,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:27,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:27,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:27,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:27,398 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:28,038 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:36:28,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:28,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:28,039 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:36:28,039 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:36:28,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:36:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 10:36:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:28,433 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:28,433 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:28,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:28,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:28,434 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:28,434 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:28,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:28,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-09-30 10:36:28,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:28,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:28,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:28,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:28,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:28,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:28,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:28,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:28,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:28,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:28,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:28,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:28,545 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:29,162 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:36:29,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:29,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:29,163 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:36:29,163 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:36:29,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:36:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:36:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:36:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:36:29,451 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 10:36:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:29,451 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:36:29,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:36:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:29,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:29,452 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:36:29,452 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:29,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-09-30 10:36:29,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:29,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:29,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:29,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:29,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:29,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:29,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:29,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:29,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:29,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:29,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:29,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:29,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:29,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:29,575 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 10:36:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:30,367 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:36:30,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:30,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:30,368 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:36:30,368 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:30,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 10:36:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:30,776 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:30,776 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:30,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:30,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:30,777 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:30,777 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:30,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-09-30 10:36:30,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:30,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:30,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:30,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:30,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:30,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:30,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:30,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:30,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:30,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:30,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:30,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:30,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:30,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:30,897 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:31,727 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:36:31,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:31,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:31,727 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:36:31,727 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:31,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 10:36:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:32,096 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:32,097 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:32,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:32,097 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:32,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:32,097 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:32,097 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:32,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-09-30 10:36:32,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:32,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:32,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:32,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:32,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:32,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:32,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:32,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:32,184 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:32,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:32,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:32,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:32,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:32,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:32,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:32,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:32,208 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:33,006 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:36:33,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:33,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:33,007 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:36:33,007 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:36:33,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:36:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 10:36:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:33,385 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:33,386 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:33,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:33,386 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:33,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:33,386 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:33,386 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:33,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:33,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-09-30 10:36:33,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:33,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:33,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:33,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:33,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:33,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:33,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:33,479 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:33,491 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:33,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:33,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:33,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:33,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:33,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:33,515 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:34,248 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:36:34,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:34,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:34,249 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:34,249 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:36:34,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:36:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 10:36:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:36:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:36:34,640 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:36:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:34,640 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:36:34,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:36:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:34,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:34,640 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:34,640 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:34,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-09-30 10:36:34,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:34,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:34,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:34,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:34,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:34,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:34,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:34,749 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:34,773 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:34,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:34,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:34,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:34,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:34,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:34,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:34,797 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:36:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:35,609 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:36:35,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:35,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:35,610 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:36:35,610 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:35,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 10:36:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:35,985 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:35,986 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:35,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:35,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:35,986 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:35,986 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:35,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:35,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-09-30 10:36:35,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:35,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:35,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:35,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:36,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:36,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:36,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:36,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:36,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:36,090 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:36,958 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 10:36:36,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:36,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:36,958 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:36:36,958 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:36,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 10:36:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:37,331 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:37,331 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:37,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:37,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:37,331 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:37,332 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:37,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:37,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-09-30 10:36:37,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:37,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:37,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:37,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:37,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:37,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:37,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:37,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:37,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:37,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:37,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:37,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:37,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:37,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:37,459 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:38,214 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:36:38,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:38,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:38,215 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:36:38,215 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:36:38,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:36:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 10:36:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:38,613 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:38,613 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:38,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:38,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:38,614 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:38,614 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:38,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:38,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-09-30 10:36:38,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:38,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:38,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:38,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:38,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:38,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:38,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:38,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:38,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:38,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:38,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:38,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:38,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:38,822 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:39,577 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:36:39,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:39,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:39,578 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:39,578 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:36:39,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:36:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 10:36:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:36:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:36:39,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 10:36:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:39,904 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:36:39,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:36:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:39,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:39,905 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:39,905 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:39,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-09-30 10:36:39,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:39,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:39,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:39,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:40,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:40,117 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:40,124 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:40,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:40,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:40,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:40,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:40,150 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 10:36:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:40,906 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:36:40,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:40,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:40,907 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:40,907 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:36:40,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:36:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 10:36:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:41,302 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:41,302 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:41,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:41,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:41,303 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:41,303 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:41,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-09-30 10:36:41,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:41,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:41,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:41,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:41,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:41,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:41,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:41,379 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:41,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:41,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:41,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:41,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:41,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:41,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:41,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:41,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:41,418 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:42,153 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:36:42,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:42,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:42,154 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:36:42,154 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:36:42,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:36:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 10:36:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:42,571 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:42,571 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:42,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:42,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:42,572 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:42,572 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:42,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-09-30 10:36:42,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:42,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:42,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:42,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:42,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:42,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:42,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:42,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:42,704 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:42,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:42,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:42,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:42,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:42,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:42,728 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:43,470 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:36:43,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:43,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:43,471 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:43,471 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:36:43,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:36:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 10:36:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:43,874 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:43,874 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:43,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:43,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:43,874 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:43,874 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:43,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-09-30 10:36:43,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:43,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:44,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:44,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:44,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:44,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:44,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:44,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:44,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:44,086 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:44,795 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:36:44,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:44,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:44,795 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:36:44,796 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:36:44,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:36:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 10:36:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:36:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:36:45,162 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:36:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:45,162 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:36:45,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:36:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:45,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:45,163 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:45,163 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:45,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-09-30 10:36:45,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:45,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:45,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:45,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:45,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:45,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:45,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:45,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:45,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:45,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:45,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:45,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:45,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:45,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:45,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:45,271 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:36:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:45,965 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:36:45,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:45,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:45,969 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:36:45,969 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:36:45,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:36:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 10:36:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:46,363 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:46,364 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:46,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:46,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:46,364 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:46,364 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:46,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:46,364 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-09-30 10:36:46,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:46,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:46,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:46,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:46,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:46,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:46,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:46,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:46,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:46,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:46,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:46,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:46,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:46,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:46,478 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:47,157 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:36:47,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:47,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:47,158 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:36:47,158 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:36:47,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:36:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:36:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:47,533 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:47,533 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:47,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:47,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:47,534 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:47,534 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:47,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-09-30 10:36:47,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:47,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:47,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:47,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:47,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:47,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:47,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:47,632 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:47,638 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:47,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:47,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:47,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:47,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:47,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:47,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:47,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:47,662 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:48,307 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:36:48,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:48,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:48,308 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:36:48,308 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:36:48,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:36:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 10:36:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:48,706 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:48,706 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:48,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:48,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:48,706 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:36:48,706 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:48,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-09-30 10:36:48,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:48,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:48,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:48,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:48,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:48,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:48,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:48,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:48,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:48,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:48,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:48,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:48,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:48,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:48,963 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:49,600 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:36:49,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:49,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:49,600 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:36:49,600 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:36:49,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:36:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-30 10:36:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:36:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:36:49,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-30 10:36:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:49,864 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:36:49,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:36:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:49,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:49,865 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:36:49,865 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:49,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-09-30 10:36:49,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:49,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:49,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:49,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:49,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:49,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:49,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:49,951 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:49,961 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:49,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:49,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:49,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:49,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:49,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:49,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:49,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:49,986 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-30 10:36:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:50,782 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:36:50,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:50,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:50,783 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:36:50,783 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:36:50,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:36:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 10:36:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:51,207 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:51,207 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:51,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:51,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:51,208 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:51,208 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:51,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-09-30 10:36:51,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:51,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:51,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:51,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:51,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:51,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:51,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:51,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:51,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:51,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:51,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:51,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:51,312 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:52,027 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:36:52,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:52,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:52,027 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:36:52,027 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:36:52,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:36:52,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:36:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:52,421 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:52,421 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:52,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:52,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:52,421 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:52,421 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:52,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:52,422 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-09-30 10:36:52,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:52,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:52,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:52,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:52,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:52,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:52,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:52,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:52,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:52,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:52,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:52,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:52,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:52,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:52,565 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:53,330 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:36:53,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:53,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:53,331 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:36:53,331 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:36:53,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:36:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 10:36:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:53,735 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:53,736 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:53,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:53,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:53,736 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:53,736 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:53,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:53,736 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-09-30 10:36:53,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:53,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:53,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:53,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:53,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:53,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:53,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:53,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:53,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:53,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:53,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:53,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:53,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:53,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:53,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:53,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:53,851 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:54,556 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:36:54,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:54,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:54,556 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:36:54,556 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:36:54,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:36:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 10:36:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:36:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:36:54,926 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:36:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:54,926 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:36:54,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:36:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:54,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:54,926 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:54,926 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:54,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-09-30 10:36:54,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:54,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:54,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:54,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:54,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:54,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:54,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:55,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:55,043 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:55,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:55,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:55,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:55,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:55,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:55,077 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:36:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:55,806 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:36:55,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:55,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:55,806 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:36:55,806 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:36:55,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:36:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 10:36:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:56,219 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:56,219 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:56,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:56,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:56,219 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:56,219 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:56,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-09-30 10:36:56,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:56,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:56,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:56,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:56,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:56,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:56,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:56,297 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:56,307 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:56,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:56,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:56,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:56,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:56,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:56,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:56,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:56,331 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:57,003 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:36:57,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:57,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:57,004 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:36:57,004 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:36:57,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:36:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 10:36:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:36:57,404 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:36:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:57,404 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:36:57,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:57,404 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:36:57,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:57,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:57,404 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:36:57,404 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:57,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-09-30 10:36:57,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:57,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:57,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:57,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:57,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:57,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:57,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:57,484 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:57,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:57,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:57,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:57,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:57,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:57,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:57,517 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:36:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:58,165 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:36:58,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:58,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:58,166 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:36:58,166 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:36:58,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:36:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:36:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:36:58,575 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:36:58,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:58,575 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:36:58,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:58,575 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:36:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:58,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:58,575 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:58,575 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:58,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-09-30 10:36:58,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:58,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:58,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:58,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:58,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:58,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:58,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:58,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:58,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:58,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:58,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:58,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:58,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:58,679 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:36:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:59,316 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:36:59,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:59,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:36:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:59,316 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:36:59,316 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:36:59,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:36:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:36:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:36:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:36:59,659 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 10:36:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:59,659 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:36:59,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:36:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:59,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:59,659 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:36:59,659 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:59,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:59,660 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-09-30 10:36:59,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:59,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:59,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:59,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:59,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:59,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:59,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:36:59,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:59,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:59,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:59,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:59,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:59,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:59,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:59,771 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 10:37:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:00,544 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:37:00,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:00,544 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:00,544 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:37:00,544 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:37:00,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:37:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 10:37:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:00,971 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:00,972 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:00,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:00,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:00,972 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:37:00,972 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:00,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:00,972 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-09-30 10:37:00,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:00,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:00,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:00,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:00,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:01,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:01,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:01,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:01,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:37:01,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:01,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:01,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:01,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:01,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:01,131 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:01,863 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:37:01,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:01,863 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:01,864 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:37:01,864 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:37:01,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:37:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 10:37:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:37:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:37:02,261 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:37:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:02,262 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:37:02,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:37:02,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:02,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:02,262 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:37:02,262 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:02,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-09-30 10:37:02,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:02,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:02,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:02,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:02,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:02,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:02,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:02,336 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:02,343 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:02,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:02,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:02,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:02,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:02,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:02,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:02,377 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:37:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:03,155 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 10:37:03,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:03,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:03,156 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:37:03,156 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:37:03,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:37:03,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 10:37:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:03,583 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:03,583 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:03,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:03,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:03,584 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:03,584 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:03,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:03,584 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-09-30 10:37:03,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:03,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:03,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:03,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:03,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:03,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:03,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:03,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:03,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:37:03,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:03,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:03,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:03,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:03,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:03,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:03,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:03,696 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:04,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:04,422 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 10:37:04,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:04,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:04,422 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:37:04,422 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:37:04,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:04,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:37:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 10:37:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:37:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:37:04,817 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:37:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:04,818 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:37:04,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:37:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:04,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:04,818 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:37:04,818 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:04,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-09-30 10:37:04,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:04,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:04,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:04,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:04,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:04,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:04,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:04,898 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:04,908 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:37:04,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:04,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:04,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:04,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:04,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:04,932 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:37:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:05,613 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:37:05,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:05,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:05,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:05,613 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:37:05,613 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:37:05,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:37:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 10:37:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:06,037 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:06,038 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:06,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:06,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:06,038 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:06,038 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:06,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:06,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-09-30 10:37:06,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:06,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:06,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:06,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:06,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:06,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:06,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:06,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:06,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:06,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:06,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:06,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:06,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:06,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:06,147 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:06,840 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:37:06,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:06,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:06,841 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:37:06,841 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:37:06,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:37:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 10:37:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:37:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:37:07,281 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:37:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:07,281 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:37:07,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:37:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:07,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:07,281 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:07,281 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:07,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-09-30 10:37:07,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:07,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:07,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:07,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:07,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:07,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:07,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:07,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:07,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:07,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:07,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:07,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:07,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:07,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:07,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:07,388 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:37:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:08,057 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:37:08,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:08,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:08,058 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:37:08,058 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:37:08,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:37:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:37:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:08,484 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:08,484 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:08,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:08,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:08,484 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:37:08,485 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:08,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-09-30 10:37:08,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:08,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:08,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:08,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:08,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:08,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:08,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:08,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:08,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:37:08,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:08,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:08,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:08,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:08,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:08,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:08,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:08,597 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:09,241 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:37:09,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:09,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:09,242 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:37:09,242 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:37:09,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:37:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 10:37:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:37:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:37:09,553 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 10:37:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:09,554 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:37:09,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:37:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:09,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:09,554 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:09,554 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:09,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-09-30 10:37:09,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:09,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:09,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:09,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:09,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:09,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:09,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:09,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:09,717 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:09,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:09,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:09,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:09,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:09,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:09,741 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 10:37:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:10,418 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:37:10,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:10,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:10,418 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:37:10,418 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:37:10,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:37:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:37:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:10,851 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:10,851 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:10,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:10,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:10,851 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:37:10,851 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:10,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-09-30 10:37:10,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:10,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:10,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:10,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:10,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:11,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:11,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:11,024 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:11,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:37:11,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:11,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:11,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:11,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:11,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:11,065 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:11,719 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:37:11,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:11,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:11,720 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:37:11,720 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:37:11,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:37:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 10:37:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:37:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:37:12,131 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:37:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:12,131 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:37:12,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:37:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:12,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:12,131 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:37:12,132 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:12,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:12,132 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-09-30 10:37:12,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:12,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:12,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:12,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:12,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:12,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:12,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:12,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:12,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:37:12,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:12,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:12,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:12,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:12,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:12,243 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:37:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:12,880 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:37:12,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:12,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:12,881 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:37:12,881 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:37:12,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:37:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 10:37:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:13,314 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:13,314 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:13,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:13,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:13,315 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:13,315 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:13,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-09-30 10:37:13,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:13,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:13,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:13,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:13,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:13,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:13,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:13,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:13,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:13,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:13,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:13,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:13,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:13,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:13,418 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:14,031 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:37:14,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:14,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:14,032 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:37:14,032 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:37:14,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:37:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:37:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:37:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:37:14,432 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:37:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:14,432 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:37:14,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:37:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:14,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:14,432 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:37:14,432 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:14,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-09-30 10:37:14,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:14,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:14,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:14,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:14,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:14,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:14,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:14,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:14,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:14,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:14,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:14,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:14,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:14,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:14,579 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:37:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:15,233 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:37:15,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:15,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:15,234 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:37:15,234 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:37:15,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:37:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:37:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:15,677 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:15,677 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:15,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:15,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:15,677 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:15,677 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:15,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-09-30 10:37:15,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:15,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:15,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:15,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:15,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:15,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:15,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:15,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:15,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:37:15,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:15,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:15,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:15,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:15,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:15,789 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:16,461 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:37:16,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:16,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:16,464 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:37:16,464 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:37:16,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:37:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 10:37:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:37:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:37:16,893 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:37:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:16,893 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:37:16,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:37:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:16,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:16,893 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:16,893 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:16,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-09-30 10:37:16,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:16,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:16,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:16,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:16,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:16,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:16,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:16,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:16,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:16,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:16,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:16,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:16,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:16,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:16,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:16,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:16,994 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:37:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:17,606 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:37:17,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:17,606 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:17,607 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:37:17,607 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:37:17,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:37:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 10:37:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:18,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:18,026 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:18,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:18,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:18,027 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:37:18,027 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:18,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:18,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-09-30 10:37:18,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:18,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:18,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:18,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:18,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:18,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:18,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:18,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:18,110 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:37:18,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:18,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:18,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:18,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:18,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:18,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:18,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:18,134 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:18,765 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:37:18,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:18,765 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:18,766 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:37:18,766 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:37:18,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:37:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:37:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:37:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:37:19,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 10:37:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:19,126 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:37:19,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:37:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:19,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:19,126 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 10:37:19,126 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:19,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:19,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-09-30 10:37:19,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:19,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:19,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:19,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:19,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:19,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:19,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:19,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:19,218 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:37:19,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:19,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:19,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:19,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:19,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:19,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:19,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:19,246 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 10:37:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:19,826 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:37:19,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:19,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:19,827 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:37:19,827 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:37:19,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:37:20,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 10:37:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:20,249 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:20,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:20,249 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:20,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:20,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:20,249 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:20,249 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:20,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-09-30 10:37:20,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:20,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:20,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:20,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:20,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:20,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:20,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:20,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:20,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:20,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:20,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:20,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:20,359 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:20,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:20,933 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:37:20,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:20,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:20,934 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:37:20,934 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:37:20,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:37:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 10:37:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:37:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:37:21,349 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:37:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:21,349 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:37:21,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:37:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:21,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:21,349 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:21,349 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:21,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-09-30 10:37:21,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:21,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:21,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:21,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:21,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:21,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:21,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:21,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:21,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:21,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:21,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:21,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:21,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:21,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:21,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:21,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:21,457 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:37:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:22,140 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:37:22,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:22,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:22,140 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:37:22,141 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:37:22,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:37:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 10:37:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:22,587 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:22,587 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:22,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:22,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:22,588 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:37:22,588 INFO L423 AbstractCegarLoop]: === Iteration 379 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:22,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1126304964, now seen corresponding path program 363 times [2018-09-30 10:37:22,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:22,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:22,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:22,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:22,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:22,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:22,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:22,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:22,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:37:22,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:22,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:22,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:22,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:22,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:22,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:22,709 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:23,295 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:37:23,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:23,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:23,296 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:37:23,296 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:37:23,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:37:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:37:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:37:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:37:23,686 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 10:37:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:23,686 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:37:23,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:37:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:23,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:23,687 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 10:37:23,687 INFO L423 AbstractCegarLoop]: === Iteration 380 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:23,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1395503934, now seen corresponding path program 364 times [2018-09-30 10:37:23,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:23,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:23,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:23,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:23,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:23,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:23,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:23,765 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:23,771 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:23,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:23,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:23,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:23,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:23,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:23,795 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 10:37:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:24,345 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:37:24,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:24,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:24,346 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:37:24,346 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:37:24,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:24,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:37:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-30 10:37:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:24,808 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:24,809 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:24,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:24,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:24,809 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:37:24,809 INFO L423 AbstractCegarLoop]: === Iteration 381 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:24,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1395502012, now seen corresponding path program 365 times [2018-09-30 10:37:24,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:24,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:24,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:24,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:24,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:24,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:24,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:24,886 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:24,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:37:24,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:24,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:24,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:24,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:24,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:24,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:24,921 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:25,479 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:37:25,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:25,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:25,480 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:37:25,480 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:37:25,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:37:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-30 10:37:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:37:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:37:25,900 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 10:37:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:25,900 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:37:25,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:37:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:25,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:25,900 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 10:37:25,901 INFO L423 AbstractCegarLoop]: === Iteration 382 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:25,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1393656892, now seen corresponding path program 366 times [2018-09-30 10:37:25,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:25,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:25,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:25,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:25,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:25,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:25,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:25,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:25,984 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:37:25,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:25,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:26,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:26,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:26,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:26,010 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 10:37:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:26,534 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:37:26,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:26,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:26,535 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:37:26,535 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:37:26,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:37:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-30 10:37:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:37:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 10:37:26,977 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 10:37:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:26,977 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 10:37:26,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:37:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 10:37:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:37:26,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:26,978 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 10:37:26,978 INFO L423 AbstractCegarLoop]: === Iteration 383 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:26,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:26,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1393654970, now seen corresponding path program 367 times [2018-09-30 10:37:26,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:26,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:26,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:26,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:26,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:27,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:27,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:27,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:27,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:27,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:27,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:37:27,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:37:27,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:37:27,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:27,083 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 10:37:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:27,586 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-30 10:37:27,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:37:27,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 10:37:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:27,587 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:37:27,587 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:37:27,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:37:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. Received shutdown request... [2018-09-30 10:37:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-30 10:37:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:37:27,851 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:37:27,859 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:37:27,859 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:37:27 BoogieIcfgContainer [2018-09-30 10:37:27,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:37:27,860 INFO L168 Benchmark]: Toolchain (without parser) took 258643.00 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -425.7 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 385.6 MB). Peak memory consumption was 147.5 MB. Max. memory is 7.1 GB. [2018-09-30 10:37:27,861 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:37:27,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:37:27,862 INFO L168 Benchmark]: Boogie Preprocessor took 25.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:37:27,862 INFO L168 Benchmark]: RCFGBuilder took 352.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:37:27,863 INFO L168 Benchmark]: TraceAbstraction took 258212.32 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -425.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 364.5 MB). Peak memory consumption was 126.4 MB. Max. memory is 7.1 GB. [2018-09-30 10:37:27,865 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 352.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 258212.32 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -425.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 364.5 MB). Peak memory consumption was 126.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 258.1s OverallTime, 383 OverallIterations, 8 TraceHistogramMax, 134.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1534 SDtfs, 2947 SDslu, 5267 SDs, 0 SdLazy, 8935 SolverSat, 4956 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9216 GetRequests, 6271 SyntacticMatches, 0 SemanticMatches, 2945 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=256, 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: 66.5s AutomataMinimizationTime, 383 MinimizatonAttempts, 5658 StatesRemovedByMinimization, 382 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 39.8s InterpolantComputationTime, 12543 NumberOfCodeBlocks, 12543 NumberOfCodeBlocksAsserted, 2169 NumberOfCheckSat, 11778 ConstructedInterpolants, 0 QuantifiedInterpolants, 538536 SizeOfPredicates, 382 NumberOfNonLiveVariables, 16248 ConjunctsInSsa, 3326 ConjunctsInUnsatCore, 765 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35828 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-37-27-873.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-37-27-873.csv Completed graceful shutdown