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/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:56:54,734 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:56:54,736 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:56:54,748 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:56:54,749 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:56:54,750 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:56:54,751 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:56:54,753 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:56:54,755 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:56:54,755 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:56:54,756 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 11:56:54,757 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 11:56:54,758 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 11:56:54,758 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 11:56:54,760 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 11:56:54,760 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 11:56:54,761 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 11:56:54,763 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 11:56:54,765 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 11:56:54,766 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 11:56:54,768 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 11:56:54,769 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 11:56:54,771 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-02 11:56:54,772 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-02 11:56:54,772 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-02 11:56:54,773 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-02 11:56:54,774 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-02 11:56:54,775 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-02 11:56:54,775 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-02 11:56:54,776 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-02 11:56:54,777 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-02 11:56:54,777 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-02 11:56:54,778 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-02 11:56:54,778 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-02 11:56:54,779 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-02 11:56:54,780 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-02 11:56:54,780 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 [2018-10-02 11:56:54,796 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:56:54,796 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:56:54,797 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:56:54,797 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:56:54,797 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:56:54,798 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:56:54,798 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:56:54,798 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:56:54,798 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:56:54,799 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:56:54,799 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:56:54,799 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:56:54,799 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:56:54,799 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:56:54,799 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:56:54,800 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:56:54,800 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:56:54,800 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:56:54,800 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:56:54,800 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:56:54,801 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:56:54,801 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:56:54,801 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:56:54,801 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:56:54,801 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:56:54,802 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:56:54,802 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:56:54,802 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:56:54,802 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:56:54,802 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:56:54,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:56:54,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:56:54,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:56:54,874 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:56:54,875 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:56:54,876 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-10-02 11:56:54,876 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-10-02 11:56:54,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:56:54,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:56:54,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:56:54,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:56:54,935 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:56:54,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:54,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:54,976 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:56:54,977 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:56:54,977 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:56:54,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:56:54,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:56:54,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:56:54,980 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:56:54,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:54,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:54,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:54,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:54,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:55,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:55,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... [2018-10-02 11:56:55,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:56:55,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:56:55,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:56:55,006 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:56:55,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:56:55,071 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-10-02 11:56:55,071 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-10-02 11:56:55,324 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:56:55,325 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:56:55 BoogieIcfgContainer [2018-10-02 11:56:55,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:56:55,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:56:55,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:56:55,332 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:56:55,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:56:54" (1/2) ... [2018-10-02 11:56:55,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a089e14 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:56:55, skipping insertion in model container [2018-10-02 11:56:55,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:56:55" (2/2) ... [2018-10-02 11:56:55,336 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-10-02 11:56:55,348 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:56:55,356 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-02 11:56:55,415 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:56:55,416 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:56:55,417 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:56:55,417 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:56:55,417 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:56:55,417 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:56:55,417 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:56:55,418 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:56:55,418 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:56:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-02 11:56:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:56:55,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:55,449 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:56:55,456 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:55,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-10-02 11:56:55,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:55,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:55,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:55,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:55,598 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:56:55,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 11:56:55,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:56:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:56:55,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:56:55,619 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-02 11:56:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:55,706 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-02 11:56:55,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:56:55,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 11:56:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:55,729 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:56:55,729 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:56:55,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:56:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:56:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:56:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:56:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-02 11:56:55,823 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-10-02 11:56:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:55,823 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-02 11:56:55,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:56:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-02 11:56:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:56:55,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:55,824 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-02 11:56:55,825 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:55,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-10-02 11:56:55,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:55,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:55,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:55,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:55,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:56:55,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 11:56:55,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:56:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:56:55,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:56:55,864 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-10-02 11:56:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:55,878 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 11:56:55,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:56:55,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-02 11:56:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:55,880 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:56:55,880 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:56:55,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:56:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:56:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:56:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:56:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-02 11:56:55,884 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-02 11:56:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:55,884 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-02 11:56:55,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:56:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-02 11:56:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:56:55,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:55,886 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 11:56:55,886 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:55,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:55,886 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-10-02 11:56:55,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:55,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:55,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:55,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:55,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:56:55,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 11:56:55,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:56:55,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:56:55,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:56:55,983 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-02 11:56:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:56,031 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 11:56:56,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:56:56,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 11:56:56,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:56,033 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:56:56,033 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:56:56,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:56:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:56:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:56:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:56:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-02 11:56:56,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-02 11:56:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:56,038 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-02 11:56:56,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:56:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-02 11:56:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:56:56,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:56,040 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:56,040 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:56,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-10-02 11:56:56,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:56,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:56,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:56,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:56,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:56,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:56,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:56,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-02 11:56:56,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:56:56,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:56:56,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:56:56,253 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-10-02 11:56:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:56,291 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-02 11:56:56,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:56:56,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-02 11:56:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:56,292 INFO L225 Difference]: With dead ends: 14 [2018-10-02 11:56:56,292 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:56:56,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:56:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:56:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-10-02 11:56:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:56:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-02 11:56:56,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-02 11:56:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:56,296 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-02 11:56:56,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:56:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-02 11:56:56,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:56:56,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:56,297 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:56,298 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:56,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:56,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-10-02 11:56:56,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:56,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:56,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:56,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:56,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:56,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:56,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:56,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:56,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:56,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:56:56,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:56:56,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:56:56,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:56:56,456 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-10-02 11:56:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:56,500 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-10-02 11:56:56,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:56:56,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 11:56:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:56,502 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:56:56,502 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:56:56,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:56:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:56:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:56:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:56:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-02 11:56:56,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-10-02 11:56:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:56,509 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-02 11:56:56,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:56:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-02 11:56:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:56:56,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:56,510 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:56,512 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:56,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-10-02 11:56:56,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:56,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:56,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:56,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:56,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:56,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:56,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-02 11:56:56,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:56,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:56,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:56:56,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:56:56,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:56:56,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:56:56,784 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-02 11:56:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:56,869 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-02 11:56:56,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:56:56,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 11:56:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:56,871 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:56:56,871 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:56:56,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:56:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:56:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:56:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:56:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-02 11:56:56,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-10-02 11:56:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:56,876 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-02 11:56:56,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:56:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-02 11:56:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:56:56,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:56,877 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-10-02 11:56:56,877 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:56,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-10-02 11:56:56,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:56,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:56,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:56,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:57,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:57,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:57,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:57,079 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:57,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:57,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:57,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:57,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:56:57,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:56:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:56:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:56:57,120 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-10-02 11:56:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:57,214 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-02 11:56:57,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:56:57,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-02 11:56:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:57,216 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:56:57,217 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:56:57,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:56:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:56:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-10-02 11:56:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:56:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-02 11:56:57,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-02 11:56:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:57,223 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-02 11:56:57,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:56:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-02 11:56:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:56:57,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:57,225 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-02 11:56:57,225 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:57,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-10-02 11:56:57,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:57,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:57,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:57,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:57,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:57,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:57,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:57,322 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:57,332 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-10-02 11:56:57,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:57,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:57,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:57,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:56:57,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:56:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:56:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:56:57,366 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-10-02 11:56:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:57,397 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-02 11:56:57,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:56:57,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 11:56:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:57,399 INFO L225 Difference]: With dead ends: 18 [2018-10-02 11:56:57,399 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:56:57,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:56:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:56:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:56:57,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:56:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-02 11:56:57,402 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-02 11:56:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:57,403 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-02 11:56:57,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:56:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-02 11:56:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:56:57,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:57,403 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-02 11:56:57,404 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:57,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:57,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-10-02 11:56:57,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:57,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:57,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:57,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:57,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:57,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:57,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:57,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:57,505 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-02 11:56:57,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:57,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:57,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:57,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:56:57,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:56:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:56:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:56:57,540 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-02 11:56:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:57,586 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-02 11:56:57,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:56:57,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 11:56:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:57,587 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:56:57,588 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:56:57,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:56:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:56:57,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 11:56:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:56:57,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-02 11:56:57,591 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-10-02 11:56:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:57,591 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-02 11:56:57,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:56:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-02 11:56:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:56:57,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:57,592 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-10-02 11:56:57,593 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:57,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:57,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-10-02 11:56:57,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:57,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:57,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:57,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:57,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:57,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:57,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:57,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:57,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:57,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:57,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:56:57,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:56:57,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:56:57,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:56:57,917 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-10-02 11:56:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:58,176 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-02 11:56:58,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:56:58,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-02 11:56:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:58,178 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:56:58,178 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:56:58,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:56:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:56:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-02 11:56:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:56:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-02 11:56:58,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-02 11:56:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:58,183 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-02 11:56:58,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:56:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-02 11:56:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:56:58,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:58,184 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-02 11:56:58,185 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:58,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-10-02 11:56:58,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:58,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:58,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:58,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:58,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:58,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:58,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:58,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:58,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:58,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:58,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:58,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:58,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:56:58,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:56:58,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:56:58,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:56:58,310 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-10-02 11:56:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:58,348 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-02 11:56:58,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:56:58,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-02 11:56:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:58,349 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:56:58,349 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:56:58,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:56:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:56:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:56:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:56:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-02 11:56:58,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-10-02 11:56:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:58,355 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-02 11:56:58,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:56:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-02 11:56:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:56:58,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:58,356 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-02 11:56:58,356 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:58,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-10-02 11:56:58,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:58,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:58,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:58,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:58,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:58,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:58,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:58,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:58,516 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 11:56:58,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:58,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:58,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:58,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:56:58,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:56:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:56:58,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:56:58,558 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-02 11:56:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:58,595 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-02 11:56:58,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:56:58,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-02 11:56:58,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:58,600 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:56:58,600 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:56:58,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:56:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:56:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 11:56:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:56:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-02 11:56:58,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-10-02 11:56:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:58,604 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-02 11:56:58,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:56:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-02 11:56:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:56:58,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:58,605 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-10-02 11:56:58,605 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:58,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-10-02 11:56:58,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:58,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:58,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:58,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:58,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:58,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:58,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:58,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:58,908 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:58,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:58,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:58,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:58,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:56:58,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:56:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:56:58,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:56:58,944 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-02 11:56:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:59,038 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-02 11:56:59,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:56:59,039 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-02 11:56:59,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:59,040 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:56:59,040 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:56:59,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:56:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:56:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-10-02 11:56:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:56:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-02 11:56:59,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-02 11:56:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:59,045 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-02 11:56:59,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:56:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-02 11:56:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:56:59,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:59,046 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-02 11:56:59,046 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:59,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-10-02 11:56:59,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:59,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:59,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:59,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:59,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:59,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:59,181 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:56:59,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:59,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:59,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:56:59,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:56:59,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:56:59,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:56:59,214 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-10-02 11:56:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:59,282 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-02 11:56:59,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:56:59,283 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 11:56:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:59,283 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:56:59,283 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:56:59,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:56:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:56:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:56:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:56:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-02 11:56:59,287 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-02 11:56:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:59,287 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-02 11:56:59,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:56:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-02 11:56:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:56:59,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:59,288 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-02 11:56:59,288 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:59,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-10-02 11:56:59,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:59,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:59,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:59,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:59,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:59,431 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:59,443 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 11:56:59,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:59,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:59,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:56:59,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:56:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:56:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:56:59,474 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-02 11:56:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:59,515 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-02 11:56:59,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:56:59,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 11:56:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:59,516 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:56:59,516 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:56:59,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:56:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:56:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:56:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:56:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-02 11:56:59,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-10-02 11:56:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:59,521 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-02 11:56:59,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:56:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-02 11:56:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:56:59,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:59,522 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-10-02 11:56:59,522 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:59,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-10-02 11:56:59,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:59,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:59,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:59,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:59,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:59,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:59,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:59,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:56:59,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:56:59,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:56:59,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:56:59,783 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-02 11:56:59,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:59,914 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-02 11:56:59,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:56:59,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-02 11:56:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:59,915 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:56:59,915 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:56:59,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:56:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:56:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-02 11:56:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:56:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-02 11:56:59,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-10-02 11:56:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:59,921 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-02 11:56:59,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:56:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-02 11:56:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:56:59,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:59,922 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-02 11:56:59,922 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:59,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:59,922 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-10-02 11:56:59,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:59,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:59,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:59,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:59,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:00,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:00,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:00,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:00,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:00,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:57:00,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:57:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:57:00,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:57:00,051 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-10-02 11:57:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:00,136 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-02 11:57:00,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:57:00,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 11:57:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:00,137 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:57:00,138 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:57:00,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:57:00,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:57:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:57:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:57:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-02 11:57:00,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-10-02 11:57:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:00,143 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-02 11:57:00,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:57:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-02 11:57:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:57:00,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:00,144 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-02 11:57:00,144 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:00,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-10-02 11:57:00,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:00,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:00,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:00,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:00,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:00,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:00,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:57:00,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:00,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:00,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:57:00,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:57:00,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:57:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:57:00,284 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-02 11:57:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:00,324 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-02 11:57:00,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:57:00,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 11:57:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:00,325 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:57:00,325 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:57:00,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:57:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:57:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 11:57:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:57:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-02 11:57:00,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-10-02 11:57:00,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:00,329 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-02 11:57:00,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:57:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-02 11:57:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:57:00,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:00,330 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-10-02 11:57:00,330 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:00,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-10-02 11:57:00,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:00,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:00,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:00,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:00,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:00,475 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:00,498 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:00,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:00,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:00,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:57:00,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:57:00,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:57:00,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:57:00,597 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-10-02 11:57:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:00,827 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-02 11:57:00,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:57:00,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-10-02 11:57:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:00,828 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:57:00,828 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:57:00,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:57:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:57:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-02 11:57:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:57:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-02 11:57:00,833 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-02 11:57:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:00,834 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-02 11:57:00,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:57:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-02 11:57:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:57:00,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:00,835 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-02 11:57:00,835 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:00,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:00,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-10-02 11:57:00,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:00,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:00,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:00,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:00,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:00,975 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:00,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-02 11:57:00,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:00,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:01,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:01,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:57:01,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:57:01,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:57:01,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:57:01,025 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-10-02 11:57:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:01,080 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-02 11:57:01,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:57:01,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 11:57:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:01,081 INFO L225 Difference]: With dead ends: 30 [2018-10-02 11:57:01,081 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:57:01,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:57:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:57:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:57:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:57:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-02 11:57:01,085 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-10-02 11:57:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:01,085 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-02 11:57:01,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:57:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-02 11:57:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:57:01,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:01,086 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-02 11:57:01,086 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:01,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-10-02 11:57:01,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:01,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:01,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:01,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:01,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:01,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:01,191 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:01,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 11:57:01,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:01,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:01,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:01,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:57:01,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:57:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:57:01,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:57:01,247 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-02 11:57:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:01,297 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-02 11:57:01,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:57:01,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 11:57:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:01,298 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:57:01,299 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:57:01,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:57:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:57:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 11:57:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:57:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-02 11:57:01,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-10-02 11:57:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:01,304 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-02 11:57:01,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:57:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-02 11:57:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:57:01,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:01,305 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-10-02 11:57:01,305 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:01,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-10-02 11:57:01,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:01,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:01,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:01,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:01,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:01,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:01,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:01,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:01,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:01,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:57:01,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:57:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:57:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:57:01,608 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-10-02 11:57:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:01,924 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-02 11:57:01,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:57:01,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-10-02 11:57:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:01,926 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:57:01,926 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:57:01,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:57:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:57:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-02 11:57:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:57:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-02 11:57:01,932 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-10-02 11:57:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:01,932 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-02 11:57:01,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:57:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-02 11:57:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:57:01,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:01,934 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-02 11:57:01,934 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:01,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:01,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-10-02 11:57:01,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:01,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:01,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:01,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:02,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:02,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:02,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:02,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:02,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:02,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:02,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:02,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:02,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:02,503 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-10-02 11:57:02,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:02,617 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-02 11:57:02,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:02,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-02 11:57:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:02,618 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:57:02,618 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:57:02,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:57:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:57:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:57:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-02 11:57:02,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-02 11:57:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:02,623 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-02 11:57:02,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-02 11:57:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:57:02,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:02,624 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-02 11:57:02,625 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:02,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-10-02 11:57:02,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:02,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:02,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:02,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:02,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:02,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:02,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:02,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:02,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-02 11:57:02,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:02,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:02,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:02,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:02,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:02,872 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-02 11:57:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:02,922 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-02 11:57:02,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:02,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-02 11:57:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:02,923 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:57:02,923 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:57:02,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:57:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 11:57:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:57:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-02 11:57:02,926 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-02 11:57:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:02,927 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-02 11:57:02,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-02 11:57:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 11:57:02,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:02,927 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-10-02 11:57:02,928 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:02,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-10-02 11:57:02,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:02,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:02,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:02,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:02,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:03,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:03,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:03,078 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:03,104 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:03,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:03,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:03,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:03,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:57:03,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:57:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:57:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:03,194 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-10-02 11:57:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:03,486 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-02 11:57:03,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:57:03,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-10-02 11:57:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:03,488 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:57:03,488 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:57:03,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:57:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:57:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-10-02 11:57:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:57:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-02 11:57:03,494 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-10-02 11:57:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:03,494 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-02 11:57:03,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:57:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-02 11:57:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:57:03,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:03,495 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-02 11:57:03,495 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:03,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-10-02 11:57:03,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:03,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:03,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:03,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:03,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:03,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:03,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:03,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:03,954 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:57:03,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:03,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:04,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:04,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:57:04,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:57:04,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:57:04,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:57:04,006 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-10-02 11:57:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:04,059 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-02 11:57:04,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:57:04,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 11:57:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:04,061 INFO L225 Difference]: With dead ends: 36 [2018-10-02 11:57:04,061 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:57:04,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:57:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:57:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:57:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:57:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-02 11:57:04,068 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-10-02 11:57:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:04,068 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-02 11:57:04,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:57:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-02 11:57:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:57:04,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:04,069 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-02 11:57:04,069 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:04,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-10-02 11:57:04,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:04,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:04,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:04,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:04,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:04,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:04,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:04,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:04,233 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-02 11:57:04,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:04,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:04,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:04,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:57:04,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:57:04,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:57:04,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:57:04,273 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-02 11:57:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:04,315 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-02 11:57:04,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:57:04,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 11:57:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:04,317 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:57:04,317 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:57:04,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:57:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:57:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 11:57:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:57:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-02 11:57:04,322 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-10-02 11:57:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:04,322 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-02 11:57:04,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:57:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-02 11:57:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:57:04,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:04,323 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-10-02 11:57:04,323 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:04,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-10-02 11:57:04,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:04,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:04,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:04,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:04,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:04,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:04,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:04,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:04,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:04,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:04,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:57:04,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:57:04,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:57:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:57:04,896 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-10-02 11:57:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:05,080 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-02 11:57:05,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:57:05,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-02 11:57:05,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:05,081 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:57:05,082 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:57:05,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:57:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:57:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-02 11:57:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:57:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-02 11:57:05,086 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-10-02 11:57:05,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:05,087 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-02 11:57:05,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:57:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-02 11:57:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:57:05,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:05,088 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-02 11:57:05,088 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:05,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-10-02 11:57:05,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:05,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:05,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:05,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:05,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:05,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:05,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:05,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:05,212 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:05,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:05,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:05,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:05,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:57:05,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:57:05,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:57:05,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:57:05,248 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-10-02 11:57:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:05,341 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-02 11:57:05,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:57:05,342 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-02 11:57:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:05,342 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:57:05,342 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:57:05,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:57:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:57:05,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:57:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:57:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-02 11:57:05,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-10-02 11:57:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:05,348 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-02 11:57:05,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:57:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-02 11:57:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:57:05,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:05,349 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-02 11:57:05,349 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:05,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:05,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-10-02 11:57:05,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:05,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:05,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:05,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:05,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:06,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:06,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:06,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:06,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:57:06,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:06,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:06,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:06,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:57:06,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:57:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:57:06,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:57:06,469 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-10-02 11:57:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:06,604 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-02 11:57:06,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:57:06,604 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-02 11:57:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:06,605 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:57:06,605 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:57:06,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:57:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:57:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 11:57:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:57:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-02 11:57:06,609 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-10-02 11:57:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:06,609 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-02 11:57:06,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:57:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-02 11:57:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 11:57:06,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:06,610 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-10-02 11:57:06,610 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:06,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-10-02 11:57:06,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:06,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:06,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:06,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:06,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:07,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:07,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:07,267 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:07,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:07,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:07,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:57:07,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:57:07,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:57:07,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:57:07,304 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-10-02 11:57:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:07,498 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-02 11:57:07,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:57:07,498 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-02 11:57:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:07,499 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:57:07,499 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:57:07,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:57:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:57:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-10-02 11:57:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:57:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-02 11:57:07,504 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-10-02 11:57:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:07,504 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-02 11:57:07,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:57:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-02 11:57:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:57:07,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:07,509 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-02 11:57:07,509 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:07,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:07,510 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-10-02 11:57:07,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:07,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:07,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:07,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:07,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:07,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:07,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:07,779 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:57:07,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:07,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:07,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:57:07,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:57:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:57:07,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:57:07,814 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-02 11:57:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:07,973 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-02 11:57:07,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:57:07,973 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 11:57:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:07,974 INFO L225 Difference]: With dead ends: 42 [2018-10-02 11:57:07,974 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:57:07,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:57:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:57:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:57:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:57:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-02 11:57:07,978 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-10-02 11:57:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:07,978 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-02 11:57:07,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:57:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-02 11:57:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:57:07,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:07,979 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-02 11:57:07,979 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:07,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:07,980 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-10-02 11:57:07,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:07,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:07,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:07,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:07,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:08,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:08,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:08,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:08,245 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:57:08,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:08,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:08,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:08,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:57:08,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:57:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:57:08,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:57:08,278 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-02 11:57:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:08,368 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-02 11:57:08,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:57:08,369 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 11:57:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:08,369 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:57:08,369 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:57:08,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:57:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:57:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 11:57:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:57:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-02 11:57:08,373 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-10-02 11:57:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:08,374 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-02 11:57:08,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:57:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-02 11:57:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 11:57:08,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:08,374 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-10-02 11:57:08,375 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:08,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:08,375 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-10-02 11:57:08,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:08,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:08,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:08,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:08,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:08,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:08,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:08,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:08,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:08,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:08,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:57:08,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:57:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:57:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:57:08,760 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-10-02 11:57:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:09,040 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-02 11:57:09,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:57:09,041 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-02 11:57:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:09,041 INFO L225 Difference]: With dead ends: 44 [2018-10-02 11:57:09,042 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:57:09,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:57:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:57:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-02 11:57:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-02 11:57:09,046 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-10-02 11:57:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:09,047 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-02 11:57:09,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:57:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-02 11:57:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:57:09,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:09,048 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-02 11:57:09,048 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:09,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-10-02 11:57:09,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:09,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:09,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:09,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:09,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:09,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:09,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:09,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:09,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:09,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:09,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:09,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:09,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:57:09,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:57:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:57:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:57:09,465 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-10-02 11:57:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:09,560 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-02 11:57:09,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:57:09,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-02 11:57:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:09,561 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:57:09,561 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:57:09,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:57:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:57:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:57:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:57:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-02 11:57:09,565 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-10-02 11:57:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:09,566 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-02 11:57:09,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:57:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-02 11:57:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:57:09,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:09,566 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-02 11:57:09,567 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:09,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-10-02 11:57:09,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:09,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:09,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:09,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:09,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:09,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:09,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:09,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:09,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-02 11:57:09,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:09,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:09,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:09,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:57:09,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:57:09,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:57:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:57:09,787 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-10-02 11:57:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:10,089 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-02 11:57:10,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:57:10,090 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-02 11:57:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:10,090 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:57:10,091 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 11:57:10,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:57:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 11:57:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 11:57:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:57:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-02 11:57:10,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-10-02 11:57:10,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:10,097 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-02 11:57:10,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:57:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-02 11:57:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:57:10,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:10,098 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-10-02 11:57:10,098 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:10,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-10-02 11:57:10,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:10,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:10,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:10,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:10,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:10,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:10,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:10,627 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:10,644 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:10,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:10,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:10,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:10,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:57:10,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:57:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:57:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:57:10,678 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-02 11:57:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:10,942 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-10-02 11:57:10,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:57:10,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-10-02 11:57:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:10,944 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:57:10,944 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 11:57:10,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:57:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 11:57:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-10-02 11:57:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-02 11:57:10,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-02 11:57:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:10,947 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-02 11:57:10,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:57:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-02 11:57:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:57:10,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:10,948 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-02 11:57:10,948 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:10,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-10-02 11:57:10,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:10,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:10,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:10,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:10,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:11,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:11,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:11,124 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-02 11:57:11,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:11,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:11,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:57:11,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:57:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:57:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:57:11,154 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-10-02 11:57:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:11,267 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-02 11:57:11,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:57:11,267 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 11:57:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:11,268 INFO L225 Difference]: With dead ends: 48 [2018-10-02 11:57:11,268 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:57:11,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:57:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:57:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:57:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:57:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-02 11:57:11,273 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-10-02 11:57:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:11,273 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-02 11:57:11,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:57:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-02 11:57:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:57:11,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:11,274 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-02 11:57:11,274 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:11,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-10-02 11:57:11,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:11,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:11,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:11,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:11,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:11,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:11,447 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:11,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:57:11,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:11,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:11,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:57:11,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:57:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:57:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:57:11,495 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-02 11:57:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:11,539 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-02 11:57:11,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:57:11,540 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 11:57:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:11,541 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:57:11,541 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:57:11,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:57:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:57:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 11:57:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:57:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-02 11:57:11,544 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-10-02 11:57:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:11,545 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-02 11:57:11,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:57:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-02 11:57:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 11:57:11,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:11,545 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-10-02 11:57:11,545 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:11,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-10-02 11:57:11,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:11,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:11,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:11,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:11,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:11,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:11,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:11,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:11,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:57:11,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:57:11,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:57:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:57:11,848 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-10-02 11:57:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:12,113 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-02 11:57:12,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:57:12,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-02 11:57:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:12,114 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:57:12,114 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:12,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:57:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-02 11:57:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-02 11:57:12,118 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-10-02 11:57:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:12,118 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-02 11:57:12,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:57:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-02 11:57:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:57:12,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:12,119 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-02 11:57:12,119 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:12,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-10-02 11:57:12,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:12,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:12,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:12,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:12,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:12,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:12,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:12,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:12,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:12,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:12,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:12,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:12,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:57:12,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:57:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:57:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:57:12,910 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-10-02 11:57:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:13,079 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-02 11:57:13,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:57:13,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-02 11:57:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:13,080 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:57:13,080 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:57:13,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:57:13,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:57:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:57:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:57:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-02 11:57:13,082 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-10-02 11:57:13,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:13,082 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-02 11:57:13,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:57:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-02 11:57:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:57:13,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:13,083 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-02 11:57:13,083 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:13,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:13,083 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-10-02 11:57:13,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:13,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:13,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:13,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:13,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:13,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:13,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:13,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:13,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 11:57:13,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:13,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:13,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:13,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:57:13,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:57:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:57:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:57:13,495 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-02 11:57:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:13,607 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-02 11:57:13,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:57:13,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-02 11:57:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:13,608 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:57:13,608 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:57:13,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:57:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:57:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 11:57:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:57:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-02 11:57:13,611 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-10-02 11:57:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:13,612 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-02 11:57:13,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:57:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-02 11:57:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 11:57:13,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:13,612 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-10-02 11:57:13,612 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:13,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-10-02 11:57:13,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:13,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:13,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:13,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:13,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:13,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:13,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:13,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:13,907 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:13,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:13,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:13,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:13,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:57:13,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:57:13,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:57:13,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:57:13,936 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-10-02 11:57:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:14,279 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-02 11:57:14,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:57:14,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-10-02 11:57:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:14,280 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:14,280 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:57:14,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:57:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:57:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-10-02 11:57:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:57:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-02 11:57:14,283 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-10-02 11:57:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:14,284 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-02 11:57:14,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:57:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-02 11:57:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:57:14,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:14,284 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-02 11:57:14,284 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:14,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-10-02 11:57:14,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:14,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:14,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:14,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:14,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:14,475 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:14,502 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 11:57:14,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:14,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:14,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:14,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:57:14,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:57:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:57:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:57:14,533 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-10-02 11:57:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:14,636 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-02 11:57:14,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:57:14,637 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 11:57:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:14,638 INFO L225 Difference]: With dead ends: 54 [2018-10-02 11:57:14,638 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:57:14,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:57:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:57:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:57:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:57:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-02 11:57:14,642 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-10-02 11:57:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:14,642 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-02 11:57:14,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:57:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-02 11:57:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:57:14,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:14,643 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-02 11:57:14,643 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:14,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-10-02 11:57:14,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:14,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:14,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:14,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:14,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:14,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:14,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:14,870 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:14,894 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-02 11:57:14,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:14,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:14,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:14,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:57:14,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:57:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:57:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:57:14,927 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-02 11:57:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:15,016 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-02 11:57:15,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:57:15,016 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 11:57:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:15,017 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:57:15,017 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:57:15,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:57:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:57:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 11:57:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:57:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-02 11:57:15,021 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-10-02 11:57:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:15,022 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-02 11:57:15,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:57:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-02 11:57:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:57:15,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:15,022 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-10-02 11:57:15,023 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:15,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:15,023 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-10-02 11:57:15,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:15,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:15,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:15,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:15,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:15,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:15,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:15,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:15,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:15,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:15,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:57:15,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:57:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:57:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:57:15,397 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-10-02 11:57:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:15,868 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-02 11:57:15,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:57:15,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-10-02 11:57:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:15,870 INFO L225 Difference]: With dead ends: 56 [2018-10-02 11:57:15,870 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:15,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:57:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-02 11:57:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:57:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-02 11:57:15,874 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-10-02 11:57:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:15,875 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-02 11:57:15,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:57:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-02 11:57:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:57:15,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:15,875 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-02 11:57:15,876 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:15,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-10-02 11:57:15,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:15,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:15,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:15,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:15,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:16,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:16,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:16,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:16,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:16,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:16,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:16,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:16,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:57:16,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:57:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:57:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:57:16,100 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-10-02 11:57:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:16,189 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-02 11:57:16,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:57:16,189 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-02 11:57:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:16,190 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:57:16,190 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:57:16,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:57:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:57:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:57:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:57:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-02 11:57:16,194 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-10-02 11:57:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:16,194 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-02 11:57:16,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:57:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-02 11:57:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:57:16,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:16,195 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-02 11:57:16,195 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:16,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:16,195 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-10-02 11:57:16,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:16,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:16,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:16,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:16,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:16,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:16,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:16,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:16,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:57:16,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:16,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:16,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:16,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:57:16,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:57:16,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:57:16,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:57:16,633 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-10-02 11:57:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:16,702 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-02 11:57:16,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:57:16,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-02 11:57:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:16,703 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:57:16,703 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:57:16,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:57:16,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:57:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 11:57:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:57:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-02 11:57:16,707 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-10-02 11:57:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:16,707 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-02 11:57:16,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:57:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-02 11:57:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 11:57:16,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:16,708 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-10-02 11:57:16,708 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:16,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:16,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-10-02 11:57:16,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:16,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:16,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:16,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:16,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:16,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:16,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:16,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:17,013 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:17,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:17,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:17,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:17,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:57:17,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:57:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:57:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:57:17,059 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-10-02 11:57:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:17,761 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-02 11:57:17,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:57:17,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-10-02 11:57:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:17,762 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:57:17,762 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:57:17,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:57:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:57:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-02 11:57:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:57:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-02 11:57:17,766 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-10-02 11:57:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:17,767 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-02 11:57:17,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:57:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-02 11:57:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:57:17,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:17,767 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-02 11:57:17,768 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:17,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-10-02 11:57:17,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:17,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:17,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:17,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:17,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:18,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:18,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:18,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:18,370 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 11:57:18,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:18,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:18,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:18,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:57:18,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:57:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:57:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:57:18,412 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-10-02 11:57:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:19,801 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-02 11:57:19,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:57:19,802 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-02 11:57:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:19,802 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:57:19,802 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:57:19,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:57:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:57:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:57:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:57:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-02 11:57:19,805 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-10-02 11:57:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:19,806 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-02 11:57:19,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:57:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-02 11:57:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:57:19,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:19,806 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-02 11:57:19,806 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:19,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:19,807 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-10-02 11:57:19,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:19,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:19,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:19,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:19,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:20,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:20,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:20,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:20,050 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-02 11:57:20,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:20,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:20,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:20,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:57:20,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:57:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:57:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:57:20,081 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-02 11:57:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:20,155 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-02 11:57:20,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:57:20,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-02 11:57:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:20,156 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:57:20,156 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:57:20,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:57:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:57:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:57:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:57:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-02 11:57:20,160 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-10-02 11:57:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:20,160 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-02 11:57:20,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:57:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-02 11:57:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 11:57:20,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:20,161 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-10-02 11:57:20,161 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:20,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-10-02 11:57:20,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:20,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:20,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:20,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:20,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:20,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:20,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:20,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:20,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:20,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:20,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:57:20,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:57:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:57:20,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:57:20,702 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-10-02 11:57:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:21,120 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-02 11:57:21,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:57:21,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-10-02 11:57:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:21,122 INFO L225 Difference]: With dead ends: 62 [2018-10-02 11:57:21,122 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:57:21,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:57:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:57:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-02 11:57:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:57:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-02 11:57:21,126 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-10-02 11:57:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:21,127 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-02 11:57:21,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:57:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-02 11:57:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:57:21,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:21,127 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-02 11:57:21,128 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:21,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-10-02 11:57:21,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:21,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:21,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:21,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:21,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:21,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:21,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:21,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:21,972 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:21,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:21,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:22,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:22,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:57:22,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:57:22,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:57:22,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:57:22,013 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-10-02 11:57:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:22,156 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-02 11:57:22,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:57:22,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-02 11:57:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:22,158 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:57:22,158 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:57:22,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:57:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:57:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:57:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:57:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-02 11:57:22,163 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-10-02 11:57:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:22,163 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-02 11:57:22,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:57:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-02 11:57:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:57:22,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:22,164 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-02 11:57:22,164 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:22,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:22,165 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-10-02 11:57:22,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:22,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:22,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:22,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:22,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:22,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:22,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:22,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:22,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:57:22,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:22,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:22,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:22,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:57:22,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:57:22,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:57:22,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:57:22,544 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-10-02 11:57:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:22,625 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-02 11:57:22,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:57:22,626 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-02 11:57:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:22,627 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:57:22,627 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 11:57:22,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:57:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 11:57:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 11:57:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:57:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-02 11:57:22,632 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-10-02 11:57:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:22,632 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-02 11:57:22,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:57:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-02 11:57:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:57:22,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:22,633 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-10-02 11:57:22,633 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:22,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:22,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-10-02 11:57:22,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:22,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:22,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:22,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:22,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:22,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:22,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:22,934 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:22,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:22,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:22,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:23,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:23,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:57:23,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:57:23,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:57:23,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:57:23,004 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-10-02 11:57:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:23,652 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-02 11:57:23,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:57:23,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-10-02 11:57:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:23,654 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:57:23,654 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 11:57:23,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:57:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 11:57:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-10-02 11:57:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:57:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-02 11:57:23,657 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-10-02 11:57:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:23,657 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-02 11:57:23,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:57:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-02 11:57:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:57:23,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:23,658 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-02 11:57:23,658 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:23,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-10-02 11:57:23,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:23,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:23,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:23,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:23,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:24,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:24,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:24,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:24,354 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-02 11:57:24,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:24,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:24,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:24,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:57:24,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:57:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:57:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:57:24,390 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-10-02 11:57:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:24,512 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-02 11:57:24,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:57:24,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-02 11:57:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:24,513 INFO L225 Difference]: With dead ends: 66 [2018-10-02 11:57:24,513 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:57:24,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:57:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:57:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:57:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:57:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-02 11:57:24,517 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-10-02 11:57:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:24,517 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-02 11:57:24,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:57:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-02 11:57:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:57:24,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:24,517 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-02 11:57:24,517 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:24,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-10-02 11:57:24,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:24,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:24,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:24,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:24,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:24,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:24,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:24,941 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:24,967 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-02 11:57:24,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:24,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:25,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:25,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:57:25,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:57:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:57:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:57:25,002 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-02 11:57:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:25,064 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-02 11:57:25,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:57:25,065 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-02 11:57:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:25,065 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:57:25,065 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 11:57:25,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:57:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 11:57:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 11:57:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:57:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-02 11:57:25,069 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-10-02 11:57:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:25,069 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-02 11:57:25,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:57:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-02 11:57:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 11:57:25,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:25,070 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-10-02 11:57:25,070 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:25,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:25,071 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-10-02 11:57:25,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:25,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:25,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:25,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:25,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:25,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:25,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:25,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:25,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:25,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:25,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:57:25,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:57:25,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:57:25,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:57:25,679 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-10-02 11:57:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:26,210 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-02 11:57:26,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:57:26,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-10-02 11:57:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:26,211 INFO L225 Difference]: With dead ends: 68 [2018-10-02 11:57:26,211 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:57:26,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:57:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:57:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-10-02 11:57:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:57:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-02 11:57:26,216 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-10-02 11:57:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:26,216 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-02 11:57:26,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:57:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-02 11:57:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:57:26,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:26,217 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-02 11:57:26,217 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:26,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-10-02 11:57:26,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:26,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:26,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:26,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:26,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:26,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:26,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:26,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:26,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:26,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:26,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:26,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:26,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:57:26,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:57:26,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:57:26,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:57:26,872 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-10-02 11:57:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:27,012 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-02 11:57:27,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:57:27,012 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-02 11:57:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:27,013 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:57:27,013 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:57:27,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:57:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:57:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:57:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:57:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-02 11:57:27,017 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-10-02 11:57:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:27,017 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-02 11:57:27,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:57:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-02 11:57:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:57:27,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:27,018 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-02 11:57:27,018 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:27,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:27,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-10-02 11:57:27,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:27,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:27,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:27,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:27,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:27,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:27,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:27,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:27,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-02 11:57:27,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:27,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:27,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:27,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:57:27,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:57:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:57:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:57:27,497 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-10-02 11:57:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:27,558 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-02 11:57:27,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:57:27,559 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-02 11:57:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:27,559 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:57:27,560 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 11:57:27,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:57:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 11:57:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 11:57:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:57:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-02 11:57:27,564 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-10-02 11:57:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:27,564 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-02 11:57:27,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:57:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-02 11:57:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 11:57:27,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:27,565 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-10-02 11:57:27,565 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:27,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-10-02 11:57:27,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:27,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:27,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:27,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:27,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:27,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:27,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:27,959 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:27,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:27,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:27,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:28,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:28,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:57:28,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:57:28,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:57:28,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:57:28,015 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-10-02 11:57:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:28,774 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-02 11:57:28,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:57:28,774 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-10-02 11:57:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:28,775 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:57:28,775 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:57:28,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:57:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:57:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-10-02 11:57:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 11:57:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-02 11:57:28,780 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-10-02 11:57:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:28,780 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-02 11:57:28,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:57:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-02 11:57:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:57:28,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:28,781 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-02 11:57:28,781 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:28,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-10-02 11:57:28,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:28,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:28,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:28,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:28,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:29,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:29,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:29,316 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:29,466 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:57:29,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:29,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:29,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:29,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:57:29,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:57:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:57:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:57:29,516 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-10-02 11:57:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:29,911 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-02 11:57:29,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:57:29,912 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-02 11:57:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:29,913 INFO L225 Difference]: With dead ends: 72 [2018-10-02 11:57:29,913 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:57:29,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:57:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:57:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:57:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:57:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-02 11:57:29,917 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-10-02 11:57:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:29,918 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-02 11:57:29,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:57:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-02 11:57:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:57:29,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:29,919 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-02 11:57:29,919 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:29,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-10-02 11:57:29,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:29,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:29,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:29,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:29,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:30,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:30,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:30,322 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:30,496 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-02 11:57:30,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:30,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:30,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:30,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:57:30,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:57:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:57:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:57:30,530 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-02 11:57:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:30,602 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-02 11:57:30,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:57:30,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-02 11:57:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:30,603 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:57:30,604 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 11:57:30,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:57:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 11:57:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 11:57:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 11:57:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-02 11:57:30,608 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-10-02 11:57:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:30,608 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-02 11:57:30,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:57:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-02 11:57:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:57:30,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:30,609 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-10-02 11:57:30,609 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:30,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:30,609 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-10-02 11:57:30,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:30,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:30,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:30,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:30,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:31,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:31,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:31,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:31,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:31,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:31,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:57:31,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:57:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:57:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:57:31,122 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-10-02 11:57:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:31,752 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-02 11:57:31,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:57:31,753 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-10-02 11:57:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:31,753 INFO L225 Difference]: With dead ends: 74 [2018-10-02 11:57:31,754 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:57:31,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:57:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:57:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-10-02 11:57:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:57:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-02 11:57:31,758 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-02 11:57:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:31,759 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-02 11:57:31,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:57:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-02 11:57:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:57:31,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:31,759 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-02 11:57:31,760 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:31,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:31,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-10-02 11:57:31,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:31,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:31,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:31,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:31,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:31,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:31,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:31,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:32,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:32,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:32,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:32,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:32,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:57:32,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:57:32,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:57:32,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:57:32,043 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-10-02 11:57:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:32,166 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-02 11:57:32,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:57:32,167 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-02 11:57:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:32,167 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:57:32,167 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:57:32,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:57:32,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:57:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:57:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:57:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-02 11:57:32,172 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-10-02 11:57:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:32,172 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-02 11:57:32,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:57:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-02 11:57:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:57:32,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:32,173 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-02 11:57:32,173 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:32,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-10-02 11:57:32,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:32,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:32,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:32,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:32,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:32,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:32,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:32,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:32,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 11:57:32,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:32,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:32,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:32,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:57:32,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:57:32,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:57:32,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:57:32,763 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-10-02 11:57:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:32,904 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-02 11:57:32,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:57:32,904 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-02 11:57:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:32,905 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:57:32,905 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:57:32,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:57:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:57:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 11:57:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:57:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-02 11:57:32,909 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-10-02 11:57:32,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:32,909 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-02 11:57:32,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:57:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-02 11:57:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 11:57:32,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:32,910 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-10-02 11:57:32,910 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:32,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-10-02 11:57:32,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:32,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:32,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:32,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:32,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:33,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:33,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:33,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:33,270 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:33,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:33,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:33,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:33,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:57:33,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:57:33,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:57:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:57:33,305 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-10-02 11:57:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:34,138 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-02 11:57:34,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:57:34,139 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-10-02 11:57:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:34,139 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:57:34,139 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 11:57:34,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:57:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 11:57:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-10-02 11:57:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:57:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-02 11:57:34,143 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-10-02 11:57:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:34,144 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-02 11:57:34,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:57:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-02 11:57:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:57:34,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:34,144 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-02 11:57:34,145 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:34,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-10-02 11:57:34,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:34,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:34,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:34,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:34,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:34,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:34,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:34,402 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:34,435 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 11:57:34,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:34,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:34,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:34,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:57:34,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:57:34,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:57:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:57:34,468 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-02 11:57:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:34,623 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-02 11:57:34,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:57:34,624 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-02 11:57:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:34,624 INFO L225 Difference]: With dead ends: 78 [2018-10-02 11:57:34,624 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:57:34,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:57:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:57:34,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:57:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:57:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-02 11:57:34,629 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-10-02 11:57:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:34,629 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-02 11:57:34,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:57:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-02 11:57:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:57:34,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:34,630 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-02 11:57:34,630 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:34,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-10-02 11:57:34,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:34,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:34,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:34,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:34,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:35,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:35,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:35,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:35,086 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:57:35,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:35,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:35,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:35,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:57:35,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:57:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:57:35,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:57:35,120 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-02 11:57:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:35,261 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-02 11:57:35,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:57:35,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-02 11:57:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:35,262 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:57:35,262 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 11:57:35,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:57:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 11:57:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 11:57:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:57:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-02 11:57:35,266 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-10-02 11:57:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:35,267 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-02 11:57:35,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:57:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-02 11:57:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 11:57:35,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:35,267 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-10-02 11:57:35,267 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:35,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:35,268 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-10-02 11:57:35,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:35,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:35,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:35,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:35,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:35,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:35,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:35,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:35,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:36,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:36,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:57:36,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:57:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:57:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:57:36,025 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-10-02 11:57:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:36,757 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-02 11:57:36,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:57:36,758 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-02 11:57:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:36,759 INFO L225 Difference]: With dead ends: 80 [2018-10-02 11:57:36,759 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:57:36,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:57:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:57:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-10-02 11:57:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:57:36,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-02 11:57:36,763 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-10-02 11:57:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:36,763 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-02 11:57:36,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:57:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-02 11:57:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:57:36,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:36,763 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-02 11:57:36,764 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:36,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-10-02 11:57:36,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:36,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:36,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:36,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:36,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:37,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:37,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:37,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:37,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:37,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:37,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:37,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:37,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:57:37,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:57:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:57:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:57:37,187 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-10-02 11:57:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:37,419 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-02 11:57:37,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:57:37,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-02 11:57:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:37,420 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:57:37,420 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:57:37,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:57:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:57:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:57:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:57:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-02 11:57:37,424 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-10-02 11:57:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:37,424 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-02 11:57:37,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:57:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-02 11:57:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:57:37,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:37,425 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-02 11:57:37,425 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:37,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:37,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-10-02 11:57:37,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:37,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:37,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:37,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:37,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:37,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:37,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:37,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:37,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-02 11:57:37,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:37,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:37,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:37,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:57:37,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:57:37,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:57:37,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:57:37,992 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-10-02 11:57:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:38,090 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-02 11:57:38,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:57:38,091 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-02 11:57:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:38,092 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:57:38,092 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 11:57:38,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:57:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 11:57:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 11:57:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:57:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-02 11:57:38,095 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-10-02 11:57:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:38,095 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-02 11:57:38,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:57:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-02 11:57:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:57:38,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:38,096 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-10-02 11:57:38,096 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:38,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:38,096 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-10-02 11:57:38,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:38,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:38,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:38,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:38,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:38,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:38,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:38,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:38,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:38,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:38,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:38,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:38,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:57:38,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:57:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:57:38,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:57:38,796 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-10-02 11:57:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:39,781 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-10-02 11:57:39,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:57:39,781 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-10-02 11:57:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:39,782 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:57:39,782 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 11:57:39,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:57:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 11:57:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-02 11:57:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:57:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-02 11:57:39,788 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-02 11:57:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:39,788 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-02 11:57:39,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:57:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-02 11:57:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:57:39,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:39,789 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-02 11:57:39,789 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:39,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-10-02 11:57:39,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:39,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:39,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:39,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:39,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:40,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:40,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:40,552 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-02 11:57:40,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:40,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:40,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:40,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:57:40,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:57:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:57:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:57:40,593 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-10-02 11:57:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:40,801 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-02 11:57:40,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:57:40,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-02 11:57:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:40,802 INFO L225 Difference]: With dead ends: 84 [2018-10-02 11:57:40,802 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:57:40,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:57:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:57:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:57:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:57:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-02 11:57:40,806 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-10-02 11:57:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:40,806 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-02 11:57:40,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:57:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-02 11:57:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:57:40,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:40,807 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-02 11:57:40,807 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:40,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-10-02 11:57:40,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:40,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:40,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:40,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:40,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:42,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:42,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:42,188 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:42,229 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-02 11:57:42,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:42,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:42,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:42,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:57:42,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:57:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:57:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:57:42,296 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-02 11:57:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:42,489 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-02 11:57:42,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:57:42,489 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-02 11:57:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:42,490 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:57:42,490 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:57:42,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:57:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:57:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 11:57:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:57:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-02 11:57:42,495 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-10-02 11:57:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:42,495 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-02 11:57:42,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:57:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-02 11:57:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 11:57:42,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:42,496 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-10-02 11:57:42,496 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:42,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-10-02 11:57:42,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:42,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:42,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:42,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:42,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:43,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:43,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:43,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:43,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:43,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:43,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:57:43,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:57:43,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:57:43,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:57:43,148 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-10-02 11:57:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:44,172 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-02 11:57:44,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:57:44,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-10-02 11:57:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:44,174 INFO L225 Difference]: With dead ends: 86 [2018-10-02 11:57:44,174 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:57:44,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:57:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:57:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-10-02 11:57:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:57:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-02 11:57:44,180 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-10-02 11:57:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:44,180 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-02 11:57:44,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:57:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-02 11:57:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:57:44,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:44,181 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-02 11:57:44,181 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:44,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:44,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-10-02 11:57:44,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:44,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:44,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:44,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:44,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:44,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:44,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:44,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:44,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:44,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:44,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:44,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:44,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:57:44,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:57:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:57:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:57:44,764 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-10-02 11:57:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:45,025 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-02 11:57:45,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:57:45,025 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-02 11:57:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:45,025 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:57:45,026 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:57:45,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:57:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:57:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:57:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:57:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-02 11:57:45,029 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-10-02 11:57:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:45,029 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-02 11:57:45,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:57:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-02 11:57:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:57:45,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:45,029 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-02 11:57:45,029 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:45,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-10-02 11:57:45,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:45,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:45,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:45,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:45,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:46,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:46,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:46,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:46,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-02 11:57:46,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:46,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:46,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:46,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:57:46,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:57:46,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:57:46,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:57:46,174 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-10-02 11:57:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:47,447 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-02 11:57:47,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:57:47,447 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-02 11:57:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:47,448 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:57:47,448 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:57:47,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:57:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:57:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 11:57:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:57:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-02 11:57:47,452 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-10-02 11:57:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:47,453 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-02 11:57:47,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:57:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-02 11:57:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 11:57:47,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:47,453 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-10-02 11:57:47,453 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:47,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:47,454 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-10-02 11:57:47,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:47,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:47,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:47,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:47,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:47,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:47,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:47,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:47,997 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:47,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:48,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:48,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:48,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:57:48,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:57:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:57:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:57:48,073 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-10-02 11:57:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:49,191 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-02 11:57:49,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:57:49,192 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-02 11:57:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:49,193 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:57:49,193 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 11:57:49,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:57:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 11:57:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-02 11:57:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 11:57:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-02 11:57:49,198 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-10-02 11:57:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:49,198 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-02 11:57:49,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:57:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-02 11:57:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:57:49,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:49,199 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-02 11:57:49,199 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:49,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-10-02 11:57:49,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:49,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:49,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:49,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:49,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:49,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:49,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:49,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:49,550 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-02 11:57:49,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:49,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:49,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:49,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:57:49,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:57:49,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:57:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:57:49,583 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-10-02 11:57:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:49,787 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-02 11:57:49,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:57:49,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-02 11:57:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:49,788 INFO L225 Difference]: With dead ends: 90 [2018-10-02 11:57:49,788 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:57:49,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:57:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:57:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:57:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:57:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-02 11:57:49,795 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-10-02 11:57:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:49,795 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-02 11:57:49,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:57:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-02 11:57:49,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:57:49,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:49,796 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-02 11:57:49,796 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:49,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:49,796 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-10-02 11:57:49,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:49,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:49,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:49,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:49,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:50,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:50,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:50,339 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:50,391 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-02 11:57:50,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:50,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:50,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:50,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:57:50,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:57:50,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:57:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:57:50,425 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-02 11:57:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:50,533 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-02 11:57:50,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:57:50,534 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-02 11:57:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:50,535 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:57:50,535 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 11:57:50,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:57:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 11:57:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 11:57:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 11:57:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-02 11:57:50,539 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-10-02 11:57:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:50,540 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-02 11:57:50,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:57:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-02 11:57:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 11:57:50,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:50,541 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-10-02 11:57:50,541 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:50,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-10-02 11:57:50,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:50,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:50,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:50,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:50,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:51,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:51,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:51,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:51,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:51,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:51,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:57:51,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:57:51,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:57:51,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:57:51,130 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-10-02 11:57:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:52,180 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-02 11:57:52,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:57:52,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-10-02 11:57:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:52,182 INFO L225 Difference]: With dead ends: 92 [2018-10-02 11:57:52,182 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:57:52,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:57:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:57:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-10-02 11:57:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 11:57:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-02 11:57:52,187 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-10-02 11:57:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:52,187 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-02 11:57:52,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:57:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-02 11:57:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:57:52,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:52,187 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-02 11:57:52,187 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:52,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:52,188 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-10-02 11:57:52,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:52,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:52,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:52,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:52,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:52,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:52,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:52,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:52,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:52,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:52,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:52,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:52,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:57:52,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:57:52,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:57:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:57:52,637 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-10-02 11:57:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:52,902 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-02 11:57:52,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:57:52,902 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-02 11:57:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:52,903 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:57:52,903 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:57:52,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:57:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:57:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:57:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:57:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-02 11:57:52,908 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-10-02 11:57:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:52,908 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-02 11:57:52,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:57:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-02 11:57:52,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:57:52,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:52,909 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-02 11:57:52,909 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:52,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:52,909 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-10-02 11:57:52,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:52,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:52,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:52,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:52,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:53,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:53,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:53,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:53,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:57:53,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:53,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:53,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:53,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:57:53,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:57:53,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:57:53,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:57:53,385 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-10-02 11:57:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:53,541 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-02 11:57:53,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:57:53,541 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-02 11:57:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:53,542 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:57:53,542 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 11:57:53,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:57:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 11:57:53,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 11:57:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 11:57:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-02 11:57:53,548 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-10-02 11:57:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:53,548 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-02 11:57:53,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:57:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-02 11:57:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 11:57:53,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:53,549 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-10-02 11:57:53,549 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:53,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:53,549 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-10-02 11:57:53,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:53,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:53,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:53,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:53,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:54,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:54,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:54,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:54,483 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:54,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:54,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:54,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:54,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:57:54,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:57:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:57:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:57:54,553 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-10-02 11:57:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:55,627 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-10-02 11:57:55,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:57:55,628 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-10-02 11:57:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:55,629 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:57:55,629 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 11:57:55,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:57:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 11:57:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-10-02 11:57:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:57:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-02 11:57:55,636 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-10-02 11:57:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:55,637 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-02 11:57:55,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:57:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-02 11:57:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:57:55,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:55,639 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-02 11:57:55,639 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:55,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-10-02 11:57:55,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:55,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:55,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:55,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:55,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:56,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:56,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:56,672 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:56,716 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 11:57:56,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:56,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:56,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:56,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:57:56,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:57:56,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:57:56,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:57:56,764 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-10-02 11:57:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:56,966 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-02 11:57:56,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:57:56,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-02 11:57:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:56,967 INFO L225 Difference]: With dead ends: 96 [2018-10-02 11:57:56,968 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:57:56,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:57:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:57:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:57:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:57:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-02 11:57:56,973 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-10-02 11:57:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:56,974 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-02 11:57:56,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:57:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-02 11:57:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:57:56,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:56,974 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-02 11:57:56,975 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:56,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-10-02 11:57:56,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:56,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:56,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:56,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:56,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:57,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:57,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:57,845 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:57,886 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 11:57:57,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:57,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:57,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:57,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:57:57,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:57:57,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:57:57,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:57:57,920 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-02 11:57:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:58,047 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-02 11:57:58,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:57:58,048 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-02 11:57:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:58,048 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:57:58,049 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 11:57:58,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:57:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 11:57:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 11:57:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:57:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-02 11:57:58,054 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-10-02 11:57:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:58,055 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-02 11:57:58,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:57:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-02 11:57:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 11:57:58,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:58,055 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-10-02 11:57:58,055 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:58,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:58,056 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-10-02 11:57:58,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:58,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:58,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:58,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:58,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:58,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:58,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:58,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:58,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:58,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:58,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:57:58,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:57:58,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:57:58,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:57:58,761 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-10-02 11:58:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:00,121 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-02 11:58:00,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:58:00,121 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-10-02 11:58:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:00,122 INFO L225 Difference]: With dead ends: 98 [2018-10-02 11:58:00,122 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:58:00,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:58:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:58:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-10-02 11:58:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 11:58:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-02 11:58:00,128 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-10-02 11:58:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:00,128 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-02 11:58:00,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:58:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-02 11:58:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:58:00,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:00,129 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-02 11:58:00,129 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:00,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-10-02 11:58:00,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:00,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:00,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:00,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:00,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:00,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:00,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:00,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:00,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:00,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:00,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:00,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:00,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:58:00,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:58:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:58:00,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:58:00,729 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-10-02 11:58:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:01,032 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-02 11:58:01,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:58:01,032 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-02 11:58:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:01,033 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:58:01,033 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:58:01,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:58:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:58:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:58:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:58:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-02 11:58:01,038 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-10-02 11:58:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:01,038 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-02 11:58:01,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:58:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-02 11:58:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:58:01,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:01,039 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-02 11:58:01,039 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:01,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-10-02 11:58:01,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:01,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:01,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:01,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:01,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:01,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:01,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:01,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:01,505 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:58:01,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:01,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:01,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:01,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:58:01,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:58:01,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:58:01,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:58:01,540 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-10-02 11:58:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:01,630 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-02 11:58:01,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:58:01,631 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-02 11:58:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:01,632 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:58:01,632 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 11:58:01,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:58:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 11:58:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 11:58:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 11:58:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-02 11:58:01,637 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-10-02 11:58:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:01,637 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-02 11:58:01,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:58:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-02 11:58:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:58:01,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:01,638 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-10-02 11:58:01,638 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:01,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-10-02 11:58:01,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:01,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:01,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:01,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:01,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:02,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:02,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:02,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:02,263 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:02,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:02,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:02,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:02,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:58:02,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:58:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:58:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:58:02,314 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-10-02 11:58:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:03,550 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-02 11:58:03,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:58:03,551 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-10-02 11:58:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:03,552 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:58:03,552 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 11:58:03,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:58:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 11:58:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-10-02 11:58:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 11:58:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-02 11:58:03,557 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-02 11:58:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:03,558 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-02 11:58:03,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:58:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-02 11:58:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:58:03,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:03,558 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-02 11:58:03,559 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:03,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:03,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-10-02 11:58:03,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:03,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:03,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:03,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:03,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:04,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:04,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:04,408 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:04,463 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-02 11:58:04,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:04,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:04,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:04,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:58:04,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:58:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:58:04,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:58:04,517 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-10-02 11:58:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:04,843 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-02 11:58:04,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:58:04,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-02 11:58:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:04,844 INFO L225 Difference]: With dead ends: 102 [2018-10-02 11:58:04,844 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:58:04,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:58:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:58:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:58:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:58:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-02 11:58:04,850 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-10-02 11:58:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:04,850 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-02 11:58:04,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:58:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-02 11:58:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:58:04,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:04,851 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-02 11:58:04,851 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:04,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-10-02 11:58:04,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:04,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:04,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:04,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:04,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:05,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:05,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:05,282 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:05,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-02 11:58:05,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:05,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:05,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:05,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:58:05,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:58:05,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:58:05,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:58:05,381 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-02 11:58:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:05,581 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-02 11:58:05,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:58:05,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-02 11:58:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:05,582 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:58:05,582 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:58:05,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:58:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:58:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 11:58:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 11:58:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-02 11:58:05,587 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-10-02 11:58:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:05,588 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-02 11:58:05,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:58:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-02 11:58:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 11:58:05,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:05,588 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-10-02 11:58:05,588 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:05,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-10-02 11:58:05,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:05,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:05,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:05,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:05,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:06,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:06,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:06,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:06,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:06,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:06,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:58:06,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:58:06,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:58:06,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:58:06,332 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-10-02 11:58:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:07,682 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-02 11:58:07,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:58:07,683 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-10-02 11:58:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:07,683 INFO L225 Difference]: With dead ends: 104 [2018-10-02 11:58:07,684 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:58:07,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:58:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:58:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-10-02 11:58:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:58:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-02 11:58:07,689 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-10-02 11:58:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:07,689 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-02 11:58:07,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:58:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-02 11:58:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:58:07,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:07,690 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-02 11:58:07,690 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:07,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-10-02 11:58:07,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:07,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:07,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:07,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:07,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:08,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:08,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:08,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:08,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:08,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:08,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:08,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:08,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:58:08,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:58:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:58:08,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:58:08,214 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-10-02 11:58:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:09,403 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-02 11:58:09,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:58:09,403 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-02 11:58:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:09,404 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:58:09,404 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:58:09,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:58:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:58:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:58:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:58:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-02 11:58:09,407 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-10-02 11:58:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:09,408 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-02 11:58:09,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:58:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-02 11:58:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:58:09,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:09,408 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-02 11:58:09,408 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:09,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:09,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-10-02 11:58:09,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:09,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:09,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:09,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:09,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:10,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:10,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:10,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:10,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-02 11:58:10,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:10,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:10,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:10,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:58:10,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:58:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:58:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:58:10,192 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-10-02 11:58:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:10,350 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-02 11:58:10,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:58:10,351 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-02 11:58:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:10,352 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:58:10,352 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 11:58:10,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:58:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 11:58:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 11:58:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:58:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-02 11:58:10,357 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-10-02 11:58:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:10,358 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-02 11:58:10,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:58:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-02 11:58:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 11:58:10,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:10,358 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-10-02 11:58:10,359 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:10,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:10,359 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-10-02 11:58:10,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:10,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:10,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:10,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:10,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:11,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:11,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:11,183 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:11,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:11,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:11,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:11,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:11,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:58:11,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:58:11,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:58:11,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:58:11,284 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-10-02 11:58:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:12,811 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-10-02 11:58:12,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:58:12,811 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-10-02 11:58:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:12,812 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:58:12,812 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 11:58:12,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:58:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 11:58:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-10-02 11:58:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 11:58:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-02 11:58:12,817 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-10-02 11:58:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:12,818 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-02 11:58:12,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:58:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-02 11:58:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:58:12,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:12,818 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-02 11:58:12,818 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:12,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-10-02 11:58:12,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:12,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:12,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:12,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:12,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:13,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:13,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:13,252 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:13,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:58:13,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:13,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:13,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:13,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:58:13,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:58:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:58:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:58:13,339 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-10-02 11:58:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:13,655 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-02 11:58:13,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:58:13,656 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-02 11:58:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:13,657 INFO L225 Difference]: With dead ends: 108 [2018-10-02 11:58:13,657 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:58:13,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:58:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:58:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:58:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:58:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-02 11:58:13,663 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-10-02 11:58:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:13,663 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-02 11:58:13,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:58:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-02 11:58:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:58:13,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:13,664 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-02 11:58:13,664 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:13,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:13,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-10-02 11:58:13,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:13,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:13,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:13,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:13,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:14,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:14,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:14,926 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:14,972 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-02 11:58:14,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:14,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:15,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:15,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:58:15,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:58:15,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:58:15,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:58:15,007 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-02 11:58:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:15,122 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-02 11:58:15,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:58:15,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-02 11:58:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:15,123 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:58:15,123 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 11:58:15,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:58:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 11:58:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 11:58:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 11:58:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-02 11:58:15,130 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-10-02 11:58:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:15,130 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-02 11:58:15,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:58:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-02 11:58:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 11:58:15,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:15,131 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-10-02 11:58:15,131 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:15,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:15,131 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-10-02 11:58:15,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:15,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:15,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:15,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:15,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:16,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:16,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:16,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:16,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:16,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:16,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:58:16,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:58:16,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:58:16,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:58:16,306 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-10-02 11:58:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:17,764 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-02 11:58:17,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:58:17,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-10-02 11:58:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:17,766 INFO L225 Difference]: With dead ends: 110 [2018-10-02 11:58:17,766 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:58:17,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:58:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:58:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-10-02 11:58:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 11:58:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-10-02 11:58:17,771 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-10-02 11:58:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:17,771 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-10-02 11:58:17,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:58:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-10-02 11:58:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:58:17,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:17,772 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-02 11:58:17,772 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:17,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-10-02 11:58:17,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:17,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:17,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:17,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:17,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:18,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:18,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:18,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:18,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:18,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:18,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:18,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:18,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:58:18,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:58:18,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:58:18,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:58:18,510 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-10-02 11:58:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:18,820 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-02 11:58:18,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:58:18,821 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-02 11:58:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:18,821 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:58:18,821 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:58:18,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:58:18,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:58:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:58:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:58:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-02 11:58:18,827 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-10-02 11:58:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:18,827 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-02 11:58:18,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:58:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-02 11:58:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:58:18,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:18,828 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-02 11:58:18,828 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:18,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-10-02 11:58:18,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:18,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:18,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:18,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:18,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:19,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:19,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:19,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:19,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:58:19,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:19,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:19,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:19,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:58:19,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:58:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:58:19,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:58:19,543 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-10-02 11:58:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:19,705 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-02 11:58:19,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:58:19,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-02 11:58:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:19,705 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:58:19,705 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 11:58:19,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:58:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 11:58:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 11:58:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 11:58:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-10-02 11:58:19,710 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-10-02 11:58:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:19,710 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-10-02 11:58:19,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:58:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-10-02 11:58:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 11:58:19,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:19,711 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-10-02 11:58:19,711 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:19,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:19,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-10-02 11:58:19,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:19,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:19,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:19,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:19,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:20,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:20,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:20,412 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:20,457 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:20,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:20,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:20,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:20,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:58:20,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:58:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:58:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:58:20,501 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-10-02 11:58:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:22,016 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-02 11:58:22,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:58:22,016 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-10-02 11:58:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:22,017 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:58:22,017 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 11:58:22,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:58:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 11:58:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-10-02 11:58:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 11:58:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-02 11:58:22,023 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-10-02 11:58:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:22,023 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-02 11:58:22,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:58:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-02 11:58:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:58:22,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:22,023 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-02 11:58:22,023 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:22,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:22,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-10-02 11:58:22,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:22,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:22,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:22,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:22,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:22,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:22,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:22,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:22,677 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:58:22,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:22,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:22,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:22,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:58:22,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:58:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:58:22,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:58:22,727 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-10-02 11:58:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:23,050 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-02 11:58:23,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:58:23,050 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-02 11:58:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:23,051 INFO L225 Difference]: With dead ends: 114 [2018-10-02 11:58:23,051 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:58:23,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:58:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:58:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:58:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:58:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-02 11:58:23,057 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-10-02 11:58:23,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:23,058 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-02 11:58:23,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:58:23,058 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-02 11:58:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:58:23,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:23,058 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-02 11:58:23,058 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:23,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:23,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-10-02 11:58:23,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:23,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:23,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:23,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:23,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:23,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:23,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:23,615 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:23,699 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:58:23,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:23,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:23,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:23,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:58:23,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:58:23,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:58:23,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:58:23,736 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-02 11:58:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:23,849 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-02 11:58:23,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:58:23,849 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-02 11:58:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:23,850 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:58:23,850 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 11:58:23,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:58:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 11:58:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 11:58:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 11:58:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-02 11:58:23,857 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-10-02 11:58:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:23,857 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-02 11:58:23,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:58:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-02 11:58:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 11:58:23,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:23,858 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-10-02 11:58:23,858 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:23,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:23,858 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-10-02 11:58:23,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:23,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:23,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:23,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:23,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:25,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:25,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:25,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:25,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:25,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:25,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:58:25,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:58:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:58:25,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:58:25,267 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-10-02 11:58:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:26,887 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-02 11:58:26,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:58:26,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-10-02 11:58:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:26,888 INFO L225 Difference]: With dead ends: 116 [2018-10-02 11:58:26,889 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:58:26,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:58:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:58:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-10-02 11:58:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 11:58:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-02 11:58:26,895 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-10-02 11:58:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:26,895 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-02 11:58:26,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:58:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-02 11:58:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:58:26,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:26,896 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-02 11:58:26,896 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:26,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:26,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-10-02 11:58:26,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:26,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:26,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:26,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:26,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:27,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:27,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:27,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:27,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:27,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:27,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:27,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:27,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:58:27,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:58:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:58:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:58:27,571 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-10-02 11:58:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:27,894 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-02 11:58:27,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:58:27,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-02 11:58:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:27,895 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:58:27,896 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:58:27,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:58:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:58:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:58:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:58:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-02 11:58:27,901 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-10-02 11:58:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:27,901 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-02 11:58:27,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:58:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-02 11:58:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:58:27,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:27,901 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-02 11:58:27,902 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:27,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:27,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-10-02 11:58:27,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:27,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:27,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:27,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:27,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:28,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:28,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:28,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:28,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-02 11:58:28,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:28,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:28,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:28,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:58:28,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:58:28,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:58:28,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:58:28,553 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-10-02 11:58:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:28,668 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-02 11:58:28,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:58:28,668 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-02 11:58:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:28,669 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:58:28,669 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 11:58:28,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:58:28,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 11:58:28,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-02 11:58:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 11:58:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-02 11:58:28,674 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-10-02 11:58:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:28,674 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-02 11:58:28,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:58:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-02 11:58:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 11:58:28,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:28,675 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-10-02 11:58:28,675 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:28,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-10-02 11:58:28,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:28,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:28,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:28,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:28,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:30,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:30,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:30,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:30,145 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:30,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:30,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:30,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:30,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:58:30,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:58:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:58:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:58:30,191 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-10-02 11:58:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:31,938 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-10-02 11:58:31,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:58:31,938 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-10-02 11:58:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:31,939 INFO L225 Difference]: With dead ends: 119 [2018-10-02 11:58:31,939 INFO L226 Difference]: Without dead ends: 116 [2018-10-02 11:58:31,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:58:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-02 11:58:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-10-02 11:58:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 11:58:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-02 11:58:31,945 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-10-02 11:58:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:31,945 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-02 11:58:31,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:58:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-02 11:58:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:58:31,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:31,946 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-02 11:58:31,946 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:31,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-10-02 11:58:31,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:31,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:31,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:31,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:31,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:32,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:32,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:32,818 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:32,875 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-02 11:58:32,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:32,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:32,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:32,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:58:32,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:58:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:58:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:58:32,928 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-10-02 11:58:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:33,389 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-02 11:58:33,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:58:33,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-02 11:58:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:33,390 INFO L225 Difference]: With dead ends: 120 [2018-10-02 11:58:33,390 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:58:33,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:58:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:58:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:58:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:58:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-02 11:58:33,396 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-10-02 11:58:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:33,396 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-02 11:58:33,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:58:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-02 11:58:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:58:33,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:33,397 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-02 11:58:33,397 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:33,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:33,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-10-02 11:58:33,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:33,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:33,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:33,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:33,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:34,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:34,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:34,055 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:34,108 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-02 11:58:34,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:34,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:34,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:34,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:58:34,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:58:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:58:34,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:58:34,148 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-02 11:58:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:34,267 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-10-02 11:58:34,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:58:34,267 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-02 11:58:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:34,268 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:58:34,268 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 11:58:34,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:58:34,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 11:58:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-02 11:58:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 11:58:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-02 11:58:34,275 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-10-02 11:58:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:34,275 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-02 11:58:34,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:58:34,276 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-02 11:58:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 11:58:34,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:34,276 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-10-02 11:58:34,276 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:34,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-10-02 11:58:34,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:34,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:34,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:34,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:34,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:35,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:35,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:35,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:35,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:35,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:35,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:58:35,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:58:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:58:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:58:35,426 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-10-02 11:58:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:37,234 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-02 11:58:37,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:58:37,235 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-10-02 11:58:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:37,235 INFO L225 Difference]: With dead ends: 122 [2018-10-02 11:58:37,236 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:58:37,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:58:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:58:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-10-02 11:58:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 11:58:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-02 11:58:37,242 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-10-02 11:58:37,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:37,243 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-02 11:58:37,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:58:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-02 11:58:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:58:37,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:37,243 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-02 11:58:37,243 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:37,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-10-02 11:58:37,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:37,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:37,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:37,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:37,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:37,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:37,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:37,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:37,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:37,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:37,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:37,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:37,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:58:37,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:58:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:58:37,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:58:37,920 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-10-02 11:58:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:38,324 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-02 11:58:38,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:58:38,325 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-02 11:58:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:38,326 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:58:38,326 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 11:58:38,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:58:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 11:58:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 11:58:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 11:58:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-02 11:58:38,331 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-10-02 11:58:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:38,331 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-02 11:58:38,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:58:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-02 11:58:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:58:38,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:38,332 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-02 11:58:38,332 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:38,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-10-02 11:58:38,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:38,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:38,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:38,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:38,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:38,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:38,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:38,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:39,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-02 11:58:39,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:39,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:39,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:39,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:58:39,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:58:39,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:58:39,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:58:39,045 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-10-02 11:58:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:39,156 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-02 11:58:39,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:58:39,157 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-02 11:58:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:39,157 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:58:39,157 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 11:58:39,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:58:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 11:58:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 11:58:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 11:58:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-02 11:58:39,163 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-10-02 11:58:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:39,163 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-02 11:58:39,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:58:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-02 11:58:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-02 11:58:39,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:39,163 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-10-02 11:58:39,164 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:39,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-10-02 11:58:39,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:39,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:39,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:39,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:39,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:40,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:40,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:40,012 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:40,061 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:40,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:40,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:40,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:40,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:58:40,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:58:40,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:58:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:58:40,102 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-10-02 11:58:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:41,975 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-02 11:58:41,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:58:41,976 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-10-02 11:58:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:41,976 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:58:41,976 INFO L226 Difference]: Without dead ends: 122 [2018-10-02 11:58:41,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:58:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-02 11:58:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-10-02 11:58:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 11:58:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-02 11:58:41,982 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-10-02 11:58:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:41,982 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-02 11:58:41,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:58:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-02 11:58:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:58:41,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:41,983 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-02 11:58:41,983 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:41,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-10-02 11:58:41,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:41,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:41,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:41,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:41,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:42,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:42,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:42,674 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:42,736 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-02 11:58:42,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:42,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:42,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:42,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:58:42,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:58:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:58:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:58:42,773 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-10-02 11:58:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:43,242 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-02 11:58:43,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:58:43,242 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-02 11:58:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:43,243 INFO L225 Difference]: With dead ends: 126 [2018-10-02 11:58:43,243 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:58:43,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:58:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:58:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:58:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:58:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-02 11:58:43,248 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-10-02 11:58:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:43,248 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-02 11:58:43,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:58:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-02 11:58:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:58:43,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:43,249 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-02 11:58:43,249 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:43,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-10-02 11:58:43,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:43,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:43,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:43,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:43,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:43,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:43,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:43,910 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:43,967 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-02 11:58:43,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:43,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:44,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:44,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:58:44,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:58:44,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:58:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:58:44,005 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-02 11:58:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:44,117 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-10-02 11:58:44,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:58:44,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-02 11:58:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:44,118 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:58:44,118 INFO L226 Difference]: Without dead ends: 84 [2018-10-02 11:58:44,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:58:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-02 11:58:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-02 11:58:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 11:58:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-02 11:58:44,124 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-10-02 11:58:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:44,124 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-02 11:58:44,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:58:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-02 11:58:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:58:44,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:44,125 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-10-02 11:58:44,125 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:44,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-10-02 11:58:44,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:44,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:44,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:44,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:44,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:44,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:44,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:44,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:45,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:45,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:45,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:58:45,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:58:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:58:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:58:45,087 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-10-02 11:58:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:47,051 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-02 11:58:47,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:58:47,052 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-10-02 11:58:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:47,052 INFO L225 Difference]: With dead ends: 128 [2018-10-02 11:58:47,052 INFO L226 Difference]: Without dead ends: 125 [2018-10-02 11:58:47,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:58:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-02 11:58:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-10-02 11:58:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 11:58:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-02 11:58:47,058 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-02 11:58:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:47,058 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-02 11:58:47,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:58:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-02 11:58:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:58:47,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:47,059 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-02 11:58:47,059 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:47,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:47,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-10-02 11:58:47,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:47,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:47,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:47,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:47,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:47,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:47,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:47,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:47,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:47,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:47,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:47,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:47,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:58:47,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:58:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:58:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:58:47,775 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-10-02 11:58:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:48,103 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-02 11:58:48,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:58:48,103 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-02 11:58:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:48,104 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:58:48,104 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:58:48,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:58:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:58:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:58:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:58:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-02 11:58:48,111 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-10-02 11:58:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:48,111 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-02 11:58:48,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:58:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-02 11:58:48,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:58:48,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:48,112 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-02 11:58:48,112 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:48,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-10-02 11:58:48,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:48,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:48,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:48,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:48,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:48,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:48,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:48,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:48,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 11:58:48,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:48,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:48,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:48,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:58:48,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:58:48,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:58:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:58:48,968 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-10-02 11:58:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:49,098 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-02 11:58:49,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:58:49,098 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-02 11:58:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:49,099 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:58:49,099 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 11:58:49,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:58:49,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 11:58:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 11:58:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 11:58:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-02 11:58:49,105 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-10-02 11:58:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:49,106 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-02 11:58:49,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:58:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-02 11:58:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-02 11:58:49,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:49,106 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-10-02 11:58:49,107 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:49,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:49,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-10-02 11:58:49,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:49,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:49,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:49,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:49,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:50,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:50,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:50,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:50,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:50,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:50,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:50,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:50,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:58:50,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:58:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:58:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:58:50,134 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-02 11:58:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:52,182 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-02 11:58:52,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:58:52,183 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-02 11:58:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:52,183 INFO L225 Difference]: With dead ends: 131 [2018-10-02 11:58:52,184 INFO L226 Difference]: Without dead ends: 128 [2018-10-02 11:58:52,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:58:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-02 11:58:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-10-02 11:58:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 11:58:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-02 11:58:52,191 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-10-02 11:58:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:52,191 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-02 11:58:52,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:58:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-02 11:58:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:58:52,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:52,192 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-02 11:58:52,192 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:52,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:52,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-10-02 11:58:52,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:52,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:52,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:52,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:52,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:52,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:52,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:52,961 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:53,026 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 11:58:53,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:53,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:53,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:53,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:58:53,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:58:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:58:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:58:53,066 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-10-02 11:58:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:53,475 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-02 11:58:53,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:58:53,476 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-02 11:58:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:53,476 INFO L225 Difference]: With dead ends: 132 [2018-10-02 11:58:53,477 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:58:53,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:58:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:58:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:58:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:58:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-02 11:58:53,482 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-10-02 11:58:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:53,483 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-02 11:58:53,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:58:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-02 11:58:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:58:53,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:53,483 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-02 11:58:53,483 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:53,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:53,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-10-02 11:58:53,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:53,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:53,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:53,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:53,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:54,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:54,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:54,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:54,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-02 11:58:54,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:54,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:54,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:54,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:58:54,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:58:54,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:58:54,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:58:54,273 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-02 11:58:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:54,397 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-02 11:58:54,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:58:54,397 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-02 11:58:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:54,398 INFO L225 Difference]: With dead ends: 91 [2018-10-02 11:58:54,398 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 11:58:54,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:58:54,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 11:58:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 11:58:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 11:58:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-02 11:58:54,404 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-10-02 11:58:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:54,405 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-02 11:58:54,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:58:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-02 11:58:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 11:58:54,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:54,405 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-10-02 11:58:54,406 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:54,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:54,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-10-02 11:58:54,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:54,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:54,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:54,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:54,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:55,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:55,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:55,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:55,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:55,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:55,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:58:55,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:58:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:58:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:58:55,647 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-10-02 11:58:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:57,776 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-02 11:58:57,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:58:57,777 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-10-02 11:58:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:57,777 INFO L225 Difference]: With dead ends: 134 [2018-10-02 11:58:57,777 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:58:57,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:58:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:58:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-10-02 11:58:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 11:58:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-02 11:58:57,783 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-10-02 11:58:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:57,784 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-02 11:58:57,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:58:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-02 11:58:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:58:57,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:57,784 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-02 11:58:57,784 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:57,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-10-02 11:58:57,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:57,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:57,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:57,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:57,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:58,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:58,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:58,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:58,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:58,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:58,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:58,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:58,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:58:58,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:58:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:58:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:58:58,578 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-10-02 11:58:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:59,173 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-02 11:58:59,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:58:59,174 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-02 11:58:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:59,174 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:58:59,174 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:58:59,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:58:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:58:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 11:58:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:58:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-02 11:58:59,178 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-10-02 11:58:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:59,179 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-02 11:58:59,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:58:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-02 11:58:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:58:59,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:59,179 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-02 11:58:59,179 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:59,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:59,180 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-10-02 11:58:59,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:59,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:59,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:59,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:59,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:59,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:59,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:59,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:59:00,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:59:00,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:00,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:00,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:00,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:59:00,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:59:00,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:59:00,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:59:00,045 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-10-02 11:59:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:00,168 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-02 11:59:00,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:59:00,168 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-02 11:59:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:00,169 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:59:00,169 INFO L226 Difference]: Without dead ends: 90 [2018-10-02 11:59:00,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:59:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-02 11:59:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-02 11:59:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 11:59:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-02 11:59:00,175 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-10-02 11:59:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:00,175 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-02 11:59:00,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:59:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-02 11:59:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 11:59:00,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:00,176 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-10-02 11:59:00,176 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:00,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-10-02 11:59:00,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:00,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:00,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:00,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:00,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:01,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:01,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:01,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:59:01,243 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:59:01,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:01,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:01,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:01,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:59:01,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:59:01,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:59:01,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:59:01,287 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-10-02 11:59:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:03,500 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-02 11:59:03,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:59:03,500 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-10-02 11:59:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:03,501 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:59:03,501 INFO L226 Difference]: Without dead ends: 134 [2018-10-02 11:59:03,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:59:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-02 11:59:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-10-02 11:59:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 11:59:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-02 11:59:03,507 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-02 11:59:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:03,507 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-02 11:59:03,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:59:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-02 11:59:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:59:03,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:03,508 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-02 11:59:03,508 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:03,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:03,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-10-02 11:59:03,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:03,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:03,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:03,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:03,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:04,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:04,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:04,212 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:59:04,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-02 11:59:04,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:04,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:04,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:04,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:59:04,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:59:04,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:59:04,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:59:04,321 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-10-02 11:59:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:04,887 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-02 11:59:04,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:59:04,888 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-02 11:59:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:04,889 INFO L225 Difference]: With dead ends: 138 [2018-10-02 11:59:04,889 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:59:04,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:59:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:59:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:59:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:59:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-02 11:59:04,895 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-10-02 11:59:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:04,895 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-02 11:59:04,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:59:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-02 11:59:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:59:04,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:04,896 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-02 11:59:04,896 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:04,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-10-02 11:59:04,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:04,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:04,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:04,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:04,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:05,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:05,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:05,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:59:05,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-02 11:59:05,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:05,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:05,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:05,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:59:05,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:59:05,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:59:05,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:59:05,780 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-02 11:59:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:05,922 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-10-02 11:59:05,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:59:05,923 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-02 11:59:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:05,923 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:59:05,924 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 11:59:05,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:59:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 11:59:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 11:59:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 11:59:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-02 11:59:05,930 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-10-02 11:59:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:05,930 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-02 11:59:05,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:59:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-02 11:59:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-02 11:59:05,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:05,930 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-10-02 11:59:05,930 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:05,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:05,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-10-02 11:59:05,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:05,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:05,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:05,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:05,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:06,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:06,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:06,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:59:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:07,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:07,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:07,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:59:07,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:59:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:59:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:59:07,073 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-10-02 11:59:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:09,393 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-02 11:59:09,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:59:09,394 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-10-02 11:59:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:09,394 INFO L225 Difference]: With dead ends: 140 [2018-10-02 11:59:09,394 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 11:59:09,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:59:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 11:59:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-10-02 11:59:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:59:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-02 11:59:09,400 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-10-02 11:59:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:09,401 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-02 11:59:09,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:59:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-02 11:59:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:59:09,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:09,401 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-02 11:59:09,401 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:09,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-10-02 11:59:09,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:09,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:09,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:09,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:59:09,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:10,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:10,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:10,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:59:10,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:59:10,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:10,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:10,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:10,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:59:10,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:59:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:59:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:59:10,223 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-10-02 11:59:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:10,821 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-02 11:59:10,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:59:10,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-02 11:59:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:10,822 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:59:10,822 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:59:10,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:59:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:59:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:59:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:59:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-02 11:59:10,827 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-10-02 11:59:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:10,828 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-02 11:59:10,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:59:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-02 11:59:10,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:59:10,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:10,828 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-02 11:59:10,828 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:10,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:10,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-10-02 11:59:10,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:10,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:10,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:10,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:10,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:11,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:11,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:11,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:59:11,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-02 11:59:11,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:11,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:11,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:11,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:59:11,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:59:11,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:59:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:59:11,717 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-10-02 11:59:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:11,848 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-02 11:59:11,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:59:11,848 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-02 11:59:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:11,848 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:59:11,849 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 11:59:11,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:59:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 11:59:11,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 11:59:11,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:59:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-02 11:59:11,856 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-10-02 11:59:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:11,856 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-02 11:59:11,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:59:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-02 11:59:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 11:59:11,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:11,857 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-10-02 11:59:11,857 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:11,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:11,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-10-02 11:59:11,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:11,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:11,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:11,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:11,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:13,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:13,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:13,427 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:59:13,479 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:59:13,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:13,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:13,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:13,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:59:13,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:59:13,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:59:13,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:59:13,523 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-10-02 11:59:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:15,935 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-02 11:59:15,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:59:15,935 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-10-02 11:59:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:15,936 INFO L225 Difference]: With dead ends: 143 [2018-10-02 11:59:15,936 INFO L226 Difference]: Without dead ends: 140 [2018-10-02 11:59:15,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:59:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-02 11:59:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-10-02 11:59:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 11:59:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-02 11:59:15,944 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-10-02 11:59:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:15,944 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-02 11:59:15,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:59:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-02 11:59:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:59:15,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:15,945 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-02 11:59:15,945 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:15,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-10-02 11:59:15,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:15,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:15,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:16,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:16,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:16,726 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:59:16,797 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:59:16,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:16,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:16,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:16,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:59:16,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:59:16,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:59:16,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:59:16,838 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-10-02 11:59:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:17,231 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-10-02 11:59:17,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:59:17,232 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-02 11:59:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:17,232 INFO L225 Difference]: With dead ends: 144 [2018-10-02 11:59:17,232 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:59:17,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:59:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:59:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:59:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:59:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-02 11:59:17,238 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-10-02 11:59:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:17,238 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-02 11:59:17,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:59:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-02 11:59:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:59:17,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:17,239 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-02 11:59:17,239 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:17,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-10-02 11:59:17,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:17,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:17,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:17,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:17,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:18,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:18,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:18,073 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:59:18,142 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-02 11:59:18,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:18,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:18,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:18,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:59:18,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:59:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:59:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:59:18,183 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-02 11:59:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:18,314 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-10-02 11:59:18,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:59:18,314 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-02 11:59:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:18,315 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:59:18,315 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 11:59:18,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:59:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 11:59:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-02 11:59:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 11:59:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-02 11:59:18,320 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-10-02 11:59:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:18,321 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-02 11:59:18,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:59:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-02 11:59:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 11:59:18,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:18,321 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-10-02 11:59:18,321 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:18,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-10-02 11:59:18,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:18,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:18,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:18,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:18,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:19,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:19,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:19,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:59:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:19,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:19,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:19,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:59:19,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:59:19,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:59:19,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:59:19,501 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-10-02 11:59:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:22,021 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-02 11:59:22,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:59:22,022 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-10-02 11:59:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:22,022 INFO L225 Difference]: With dead ends: 146 [2018-10-02 11:59:22,022 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:59:22,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:59:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:59:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-10-02 11:59:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 11:59:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-10-02 11:59:22,029 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-10-02 11:59:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:22,029 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-10-02 11:59:22,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:59:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-10-02 11:59:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:59:22,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:22,030 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-02 11:59:22,030 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:22,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:22,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-10-02 11:59:22,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:22,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:22,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:22,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:59:22,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:22,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:22,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:22,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:59:22,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:59:22,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:22,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:22,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:22,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:59:22,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:59:22,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:59:22,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:59:22,929 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-10-02 11:59:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:23,600 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-10-02 11:59:23,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:59:23,601 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-02 11:59:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:23,601 INFO L225 Difference]: With dead ends: 147 [2018-10-02 11:59:23,601 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:59:23,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:59:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:59:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:59:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:59:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-02 11:59:23,607 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-10-02 11:59:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:23,608 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-02 11:59:23,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:59:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-02 11:59:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:59:23,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:23,608 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-02 11:59:23,608 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:23,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-10-02 11:59:23,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:23,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:23,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:23,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:23,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:24,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:24,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:24,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:59:24,541 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 11:59:24,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:24,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:24,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:24,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:59:24,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:59:24,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:59:24,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:59:24,582 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-10-02 11:59:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:24,737 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-02 11:59:24,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:59:24,737 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-02 11:59:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:24,738 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:59:24,738 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 11:59:24,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:59:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 11:59:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-02 11:59:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 11:59:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-02 11:59:24,745 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-10-02 11:59:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:24,745 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-02 11:59:24,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:59:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-02 11:59:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-02 11:59:24,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:24,745 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-10-02 11:59:24,745 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:24,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:24,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-10-02 11:59:24,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:24,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:24,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:24,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:24,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:25,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:25,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:25,853 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:59:25,910 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:59:25,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:25,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:25,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:25,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:59:25,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:59:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:59:25,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:59:25,960 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-10-02 11:59:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:28,609 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-02 11:59:28,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:59:28,610 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-10-02 11:59:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:28,610 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:59:28,610 INFO L226 Difference]: Without dead ends: 146 [2018-10-02 11:59:28,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:59:28,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-02 11:59:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-10-02 11:59:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 11:59:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-02 11:59:28,617 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-10-02 11:59:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:28,617 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-02 11:59:28,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:59:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-02 11:59:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:59:28,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:28,618 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-02 11:59:28,618 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:28,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-10-02 11:59:28,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:28,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:28,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:28,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:28,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:29,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:29,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:29,448 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:59:29,523 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 11:59:29,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:29,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:29,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:29,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:59:29,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:59:29,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:59:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:59:29,580 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-10-02 11:59:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:30,270 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-02 11:59:30,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:59:30,270 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-02 11:59:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:30,270 INFO L225 Difference]: With dead ends: 150 [2018-10-02 11:59:30,271 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:59:30,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:59:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:59:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:59:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:59:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-02 11:59:30,277 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-10-02 11:59:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:30,277 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-02 11:59:30,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:59:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-02 11:59:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:59:30,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:30,277 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-02 11:59:30,277 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:30,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-10-02 11:59:30,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:30,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:30,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:30,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:30,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:31,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:31,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:31,182 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:59:31,253 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:59:31,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:31,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:31,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:31,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:59:31,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:59:31,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:59:31,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:59:31,295 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-02 11:59:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:31,476 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-02 11:59:31,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:59:31,476 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-02 11:59:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:31,477 INFO L225 Difference]: With dead ends: 103 [2018-10-02 11:59:31,477 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 11:59:31,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:59:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 11:59:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 11:59:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 11:59:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-02 11:59:31,484 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-10-02 11:59:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:31,484 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-02 11:59:31,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:59:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-02 11:59:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 11:59:31,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:31,484 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-10-02 11:59:31,485 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:31,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-10-02 11:59:31,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:31,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:31,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:31,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:31,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:32,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:32,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:32,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:59:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:32,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:32,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:32,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:59:32,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:59:32,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:59:32,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:59:32,769 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-10-02 11:59:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:35,519 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-02 11:59:35,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:59:35,519 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-10-02 11:59:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:35,520 INFO L225 Difference]: With dead ends: 152 [2018-10-02 11:59:35,520 INFO L226 Difference]: Without dead ends: 149 [2018-10-02 11:59:35,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:59:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-02 11:59:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-10-02 11:59:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 11:59:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-10-02 11:59:35,526 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-10-02 11:59:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:35,526 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-10-02 11:59:35,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:59:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-10-02 11:59:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:59:35,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:35,527 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-02 11:59:35,527 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:35,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-10-02 11:59:35,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:35,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:35,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:35,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:59:35,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:36,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:36,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:36,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:59:36,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:59:36,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:36,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:36,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:36,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:59:36,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:59:36,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:59:36,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:59:36,497 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-10-02 11:59:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:37,200 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-10-02 11:59:37,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:59:37,200 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-02 11:59:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:37,201 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:59:37,201 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:59:37,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:59:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:59:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:59:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:59:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-02 11:59:37,209 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-10-02 11:59:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:37,209 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-02 11:59:37,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:59:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-02 11:59:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:59:37,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:37,210 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-02 11:59:37,210 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:37,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-10-02 11:59:37,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:37,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:37,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:37,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:37,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:38,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:38,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:38,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:59:38,294 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-02 11:59:38,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:38,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:38,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:38,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:59:38,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:59:38,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:59:38,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:59:38,335 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-10-02 11:59:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:38,497 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-02 11:59:38,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:59:38,498 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-02 11:59:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:38,498 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:59:38,498 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 11:59:38,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:59:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 11:59:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-02 11:59:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 11:59:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-02 11:59:38,505 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-10-02 11:59:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:38,505 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-02 11:59:38,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:59:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-02 11:59:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 11:59:38,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:38,506 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-10-02 11:59:38,506 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:38,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-10-02 11:59:38,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:38,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:38,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:38,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:38,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:39,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:39,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:39,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:59:39,783 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:59:39,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:39,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:39,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:39,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:59:39,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:59:39,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:59:39,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:59:39,833 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-10-02 11:59:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:42,703 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-10-02 11:59:42,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:59:42,703 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-10-02 11:59:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:42,704 INFO L225 Difference]: With dead ends: 155 [2018-10-02 11:59:42,704 INFO L226 Difference]: Without dead ends: 152 [2018-10-02 11:59:42,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:59:42,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-02 11:59:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-10-02 11:59:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 11:59:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-02 11:59:42,711 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-02 11:59:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:42,711 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-02 11:59:42,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:59:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-02 11:59:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:59:42,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:42,712 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-02 11:59:42,712 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:42,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-10-02 11:59:42,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:42,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:42,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:42,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:42,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:43,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:43,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:43,632 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:59:43,709 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-02 11:59:43,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:43,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:43,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:43,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:59:43,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:59:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:59:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:59:43,753 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-10-02 11:59:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:44,486 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-02 11:59:44,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:59:44,486 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-02 11:59:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:44,487 INFO L225 Difference]: With dead ends: 156 [2018-10-02 11:59:44,487 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:59:44,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:59:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:59:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:59:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:59:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-02 11:59:44,494 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-10-02 11:59:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:44,494 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-02 11:59:44,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:59:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-02 11:59:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:59:44,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:44,494 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-02 11:59:44,495 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:44,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:44,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-10-02 11:59:44,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:44,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:44,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:44,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:44,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:45,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:45,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:45,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:59:45,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-02 11:59:45,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:45,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:45,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:45,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:59:45,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:59:45,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:59:45,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:59:45,577 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-02 11:59:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:45,724 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-10-02 11:59:45,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:59:45,724 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-02 11:59:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:45,725 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:59:45,725 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 11:59:45,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:59:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 11:59:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 11:59:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 11:59:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-02 11:59:45,732 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-10-02 11:59:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:45,732 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-02 11:59:45,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:59:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-02 11:59:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 11:59:45,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:45,733 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-10-02 11:59:45,733 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:45,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-10-02 11:59:45,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:45,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:45,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:45,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:45,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:47,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:47,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:47,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:59:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:47,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:47,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:47,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:59:47,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:59:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:59:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:59:47,129 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-10-02 11:59:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:50,109 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-02 11:59:50,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:59:50,109 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-10-02 11:59:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:50,110 INFO L225 Difference]: With dead ends: 158 [2018-10-02 11:59:50,110 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:59:50,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:59:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:59:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-10-02 11:59:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 11:59:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-02 11:59:50,119 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-10-02 11:59:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:50,119 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-02 11:59:50,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:59:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-02 11:59:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:59:50,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:50,120 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-02 11:59:50,120 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:50,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:50,120 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-10-02 11:59:50,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:50,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:50,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:50,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:59:50,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:51,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:51,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:51,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:59:51,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:59:51,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:51,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:51,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:51,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:59:51,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:59:51,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:59:51,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:59:51,177 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-10-02 11:59:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:51,648 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-10-02 11:59:51,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:59:51,648 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-02 11:59:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:51,649 INFO L225 Difference]: With dead ends: 159 [2018-10-02 11:59:51,649 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 11:59:51,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:59:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 11:59:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 11:59:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:59:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-02 11:59:51,656 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-10-02 11:59:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:51,657 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-02 11:59:51,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:59:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-02 11:59:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:59:51,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:51,657 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-02 11:59:51,657 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:51,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-10-02 11:59:51,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:51,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:51,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:51,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:51,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:52,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:52,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:52,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:59:52,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-02 11:59:52,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:52,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:52,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:52,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:59:52,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:59:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:59:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:59:52,780 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-10-02 11:59:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:52,930 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-02 11:59:52,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:59:52,931 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-02 11:59:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:52,931 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:59:52,931 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 11:59:52,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:59:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 11:59:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 11:59:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 11:59:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-02 11:59:52,938 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-10-02 11:59:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:52,938 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-02 11:59:52,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:59:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-02 11:59:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-02 11:59:52,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:52,939 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-10-02 11:59:52,939 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:52,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:52,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-10-02 11:59:52,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:52,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:52,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:52,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:52,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:54,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:54,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:54,287 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:59:54,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:59:54,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:54,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:54,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:54,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:59:54,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:59:54,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:59:54,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:59:54,402 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-10-02 11:59:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:57,531 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-02 11:59:57,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:59:57,532 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-10-02 11:59:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:57,532 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:59:57,532 INFO L226 Difference]: Without dead ends: 158 [2018-10-02 11:59:57,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:59:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-02 11:59:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-10-02 11:59:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 11:59:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-02 11:59:57,542 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-10-02 11:59:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:57,542 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-02 11:59:57,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:59:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-02 11:59:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:59:57,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:57,543 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-02 11:59:57,543 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:57,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-10-02 11:59:57,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:57,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:57,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:57,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:57,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:59:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:58,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:59:58,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:59:58,519 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:59:58,607 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-02 11:59:58,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:59:58,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:59:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:59:58,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:59:58,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:59:58,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:59:58,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:59:58,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:59:58,649 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-10-02 11:59:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:59:59,496 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-10-02 11:59:59,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:59:59,496 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-02 11:59:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:59:59,497 INFO L225 Difference]: With dead ends: 162 [2018-10-02 11:59:59,497 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:59:59,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:59:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:59:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:59:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:59:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-02 11:59:59,505 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-10-02 11:59:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:59:59,506 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-02 11:59:59,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:59:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-02 11:59:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:59:59,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:59:59,506 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-02 11:59:59,507 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:59:59,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:59:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-10-02 11:59:59,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:59:59,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:59:59,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:59,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:59:59,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:59:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:00,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:00,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:00,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:00:00,628 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-02 12:00:00,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:00,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:00,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:00,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 12:00:00,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 12:00:00,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 12:00:00,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 12:00:00,670 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-02 12:00:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:00,864 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-10-02 12:00:00,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 12:00:00,865 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-02 12:00:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:00,865 INFO L225 Difference]: With dead ends: 111 [2018-10-02 12:00:00,865 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 12:00:00,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 12:00:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 12:00:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-02 12:00:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 12:00:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-02 12:00:00,872 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-10-02 12:00:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:00,872 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-02 12:00:00,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 12:00:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-02 12:00:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 12:00:00,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:00,873 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-10-02 12:00:00,873 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:00,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-10-02 12:00:00,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:00,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:00,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:00,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:00,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:02,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:02,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:02,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:00:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:02,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:02,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:02,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 12:00:02,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 12:00:02,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 12:00:02,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 12:00:02,376 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-10-02 12:00:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:05,645 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-02 12:00:05,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 12:00:05,645 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-10-02 12:00:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:05,646 INFO L225 Difference]: With dead ends: 164 [2018-10-02 12:00:05,646 INFO L226 Difference]: Without dead ends: 161 [2018-10-02 12:00:05,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 12:00:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-02 12:00:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-02 12:00:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 12:00:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-02 12:00:05,653 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-02 12:00:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:05,654 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-02 12:00:05,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 12:00:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-02 12:00:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 12:00:05,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:05,654 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-02 12:00:05,654 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:05,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:05,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-10-02 12:00:05,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:05,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:05,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:05,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:00:05,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:06,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:06,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:06,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:00:06,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:00:06,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:06,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:06,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:06,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 12:00:06,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 12:00:06,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 12:00:06,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 12:00:06,758 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-10-02 12:00:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:07,389 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-10-02 12:00:07,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 12:00:07,390 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-02 12:00:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:07,390 INFO L225 Difference]: With dead ends: 165 [2018-10-02 12:00:07,390 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 12:00:07,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 12:00:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 12:00:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 12:00:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 12:00:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-02 12:00:07,399 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-10-02 12:00:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:07,399 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-02 12:00:07,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 12:00:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-02 12:00:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 12:00:07,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:07,400 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-02 12:00:07,400 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:07,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:07,400 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-10-02 12:00:07,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:07,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:07,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:07,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:07,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:08,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:08,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:08,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:00:08,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 12:00:08,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:08,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:08,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:08,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 12:00:08,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 12:00:08,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 12:00:08,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 12:00:08,615 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-10-02 12:00:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:08,801 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-02 12:00:08,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 12:00:08,801 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-02 12:00:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:08,802 INFO L225 Difference]: With dead ends: 113 [2018-10-02 12:00:08,802 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 12:00:08,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 12:00:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 12:00:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-02 12:00:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 12:00:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-02 12:00:08,809 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-10-02 12:00:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:08,809 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-02 12:00:08,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 12:00:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-02 12:00:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-02 12:00:08,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:08,810 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-10-02 12:00:08,810 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:08,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:08,810 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-10-02 12:00:08,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:08,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:08,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:08,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:08,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:10,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:10,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:10,233 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:00:10,299 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:00:10,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:10,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:10,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:10,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 12:00:10,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 12:00:10,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 12:00:10,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 12:00:10,350 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-10-02 12:00:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:13,711 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-10-02 12:00:13,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 12:00:13,712 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-10-02 12:00:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:13,712 INFO L225 Difference]: With dead ends: 167 [2018-10-02 12:00:13,713 INFO L226 Difference]: Without dead ends: 164 [2018-10-02 12:00:13,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 12:00:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-02 12:00:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-10-02 12:00:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 12:00:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-02 12:00:13,720 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-10-02 12:00:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:13,720 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-02 12:00:13,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 12:00:13,720 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-02 12:00:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 12:00:13,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:13,720 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-02 12:00:13,720 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:13,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-10-02 12:00:13,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:13,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:13,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:13,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:13,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:14,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:14,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:14,756 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:00:14,845 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 12:00:14,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:14,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:14,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:14,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 12:00:14,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:00:14,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:00:14,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 12:00:14,899 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-10-02 12:00:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:15,759 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-02 12:00:15,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 12:00:15,760 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-02 12:00:15,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:15,760 INFO L225 Difference]: With dead ends: 168 [2018-10-02 12:00:15,760 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 12:00:15,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 12:00:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 12:00:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 12:00:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 12:00:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-02 12:00:15,779 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-10-02 12:00:15,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:15,779 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-02 12:00:15,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:00:15,779 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-02 12:00:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 12:00:15,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:15,779 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-02 12:00:15,779 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:15,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:15,780 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-10-02 12:00:15,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:15,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:15,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:15,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:15,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:17,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:17,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:17,515 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:00:17,598 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-02 12:00:17,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:17,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:17,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:17,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 12:00:17,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:00:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:00:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 12:00:17,642 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-02 12:00:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:17,817 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-02 12:00:17,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 12:00:17,817 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-02 12:00:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:17,818 INFO L225 Difference]: With dead ends: 115 [2018-10-02 12:00:17,818 INFO L226 Difference]: Without dead ends: 112 [2018-10-02 12:00:17,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 12:00:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-02 12:00:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-02 12:00:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 12:00:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-02 12:00:17,826 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-10-02 12:00:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:17,826 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-02 12:00:17,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:00:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-02 12:00:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 12:00:17,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:17,826 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-10-02 12:00:17,827 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:17,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-10-02 12:00:17,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:17,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:17,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:17,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:17,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:19,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:19,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:19,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:00:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:19,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:19,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:19,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 12:00:19,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:00:19,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:00:19,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 12:00:19,410 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-10-02 12:00:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:22,882 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-02 12:00:22,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 12:00:22,882 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-10-02 12:00:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:22,883 INFO L225 Difference]: With dead ends: 170 [2018-10-02 12:00:22,883 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 12:00:22,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 12:00:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 12:00:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-10-02 12:00:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 12:00:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-10-02 12:00:22,892 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-10-02 12:00:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:22,892 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-10-02 12:00:22,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:00:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-10-02 12:00:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 12:00:22,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:22,893 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-02 12:00:22,893 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:22,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:22,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-10-02 12:00:22,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:22,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:22,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:22,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:00:22,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:23,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:23,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:23,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:00:24,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:00:24,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:24,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:24,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:24,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 12:00:24,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 12:00:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 12:00:24,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 12:00:24,079 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-10-02 12:00:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:24,602 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-02 12:00:24,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 12:00:24,603 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-02 12:00:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:24,603 INFO L225 Difference]: With dead ends: 171 [2018-10-02 12:00:24,603 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 12:00:24,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 12:00:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 12:00:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 12:00:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 12:00:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-02 12:00:24,611 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-10-02 12:00:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:24,611 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-02 12:00:24,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 12:00:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-02 12:00:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 12:00:24,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:24,611 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-02 12:00:24,611 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:24,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:24,612 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-10-02 12:00:24,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:24,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:24,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:24,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:24,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:25,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:25,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:25,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:00:25,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 12:00:25,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:25,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:25,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:25,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 12:00:25,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 12:00:25,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 12:00:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 12:00:25,894 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-10-02 12:00:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:26,058 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-02 12:00:26,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 12:00:26,059 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-02 12:00:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:26,059 INFO L225 Difference]: With dead ends: 117 [2018-10-02 12:00:26,060 INFO L226 Difference]: Without dead ends: 114 [2018-10-02 12:00:26,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 12:00:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-02 12:00:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-02 12:00:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 12:00:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-02 12:00:26,069 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-10-02 12:00:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:26,070 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-02 12:00:26,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 12:00:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-02 12:00:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 12:00:26,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:26,070 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-10-02 12:00:26,071 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:26,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-10-02 12:00:26,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:26,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:26,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:26,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:26,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:27,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:27,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:27,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:00:27,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:00:27,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:27,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:27,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:27,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 12:00:27,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 12:00:27,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 12:00:27,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 12:00:27,742 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-10-02 12:00:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:31,340 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-02 12:00:31,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 12:00:31,341 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-10-02 12:00:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:31,341 INFO L225 Difference]: With dead ends: 173 [2018-10-02 12:00:31,341 INFO L226 Difference]: Without dead ends: 170 [2018-10-02 12:00:31,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 12:00:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-02 12:00:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-10-02 12:00:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-02 12:00:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-02 12:00:31,349 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-10-02 12:00:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:31,350 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-02 12:00:31,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 12:00:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-02 12:00:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 12:00:31,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:31,350 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-02 12:00:31,350 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:31,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-10-02 12:00:31,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:31,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:31,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:31,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:31,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:32,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:32,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:32,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:00:32,563 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-10-02 12:00:32,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:32,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:32,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:32,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 12:00:32,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 12:00:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 12:00:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 12:00:32,617 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-10-02 12:00:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:32,977 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-10-02 12:00:32,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 12:00:32,978 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-02 12:00:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:32,978 INFO L225 Difference]: With dead ends: 174 [2018-10-02 12:00:32,978 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 12:00:32,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 12:00:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 12:00:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 12:00:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 12:00:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-02 12:00:32,987 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-10-02 12:00:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:32,987 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-02 12:00:32,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 12:00:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-02 12:00:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 12:00:32,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:32,987 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-02 12:00:32,988 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:32,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-10-02 12:00:32,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:32,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:32,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:32,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:32,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:34,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:34,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:34,184 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:00:34,274 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-02 12:00:34,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:34,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:34,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:34,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 12:00:34,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 12:00:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 12:00:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 12:00:34,326 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-02 12:00:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:34,510 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-10-02 12:00:34,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 12:00:34,510 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-02 12:00:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:34,511 INFO L225 Difference]: With dead ends: 119 [2018-10-02 12:00:34,511 INFO L226 Difference]: Without dead ends: 116 [2018-10-02 12:00:34,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 12:00:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-02 12:00:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-02 12:00:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-02 12:00:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-10-02 12:00:34,519 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-10-02 12:00:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:34,519 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-10-02 12:00:34,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 12:00:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-10-02 12:00:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-02 12:00:34,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:34,520 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-10-02 12:00:34,520 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:34,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-10-02 12:00:34,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:34,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:34,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:34,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:34,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:36,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:36,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:36,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:00:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:36,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:36,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:36,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 12:00:36,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 12:00:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 12:00:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 12:00:36,213 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-10-02 12:00:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:39,949 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-02 12:00:39,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 12:00:39,950 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-10-02 12:00:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:39,951 INFO L225 Difference]: With dead ends: 176 [2018-10-02 12:00:39,951 INFO L226 Difference]: Without dead ends: 173 [2018-10-02 12:00:39,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 12:00:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-02 12:00:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-10-02 12:00:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-02 12:00:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-02 12:00:39,958 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-10-02 12:00:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:39,958 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-02 12:00:39,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 12:00:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-02 12:00:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 12:00:39,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:39,959 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-02 12:00:39,959 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:39,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-10-02 12:00:39,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:39,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:39,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:39,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:00:39,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:41,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:41,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:41,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:00:41,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:00:41,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:41,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:41,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:41,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 12:00:41,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:00:41,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:00:41,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 12:00:41,223 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-10-02 12:00:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:41,778 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-10-02 12:00:41,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:00:41,779 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-02 12:00:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:41,779 INFO L225 Difference]: With dead ends: 177 [2018-10-02 12:00:41,779 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 12:00:41,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 12:00:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 12:00:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 12:00:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 12:00:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-02 12:00:41,789 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-10-02 12:00:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:41,790 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-02 12:00:41,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:00:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-02 12:00:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 12:00:41,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:41,790 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-02 12:00:41,791 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:41,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-10-02 12:00:41,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:41,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:41,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:41,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:41,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:43,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:43,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:43,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:00:43,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-02 12:00:43,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:43,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:43,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:43,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 12:00:43,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:00:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:00:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 12:00:43,177 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-10-02 12:00:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:43,364 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-02 12:00:43,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:00:43,364 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-02 12:00:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:43,365 INFO L225 Difference]: With dead ends: 121 [2018-10-02 12:00:43,365 INFO L226 Difference]: Without dead ends: 118 [2018-10-02 12:00:43,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 12:00:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-02 12:00:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-02 12:00:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-02 12:00:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-02 12:00:43,373 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-10-02 12:00:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:43,373 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-02 12:00:43,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:00:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-02 12:00:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-02 12:00:43,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:43,373 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-10-02 12:00:43,373 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:43,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:43,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-10-02 12:00:43,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:43,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:43,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:43,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:43,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:00:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:44,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:00:44,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:00:45,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:00:45,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:00:45,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:00:45,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:00:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:00:45,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:00:45,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 12:00:45,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:00:45,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:00:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 12:00:45,129 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-10-02 12:00:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:00:49,005 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-10-02 12:00:49,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:00:49,006 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-10-02 12:00:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:00:49,006 INFO L225 Difference]: With dead ends: 179 [2018-10-02 12:00:49,006 INFO L226 Difference]: Without dead ends: 176 [2018-10-02 12:00:49,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 12:00:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-02 12:00:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-10-02 12:00:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-02 12:00:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-02 12:00:49,015 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-10-02 12:00:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:00:49,015 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-02 12:00:49,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:00:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-02 12:00:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 12:00:49,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:00:49,015 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-10-02 12:00:49,015 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:00:49,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 12:00:49,016 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-10-02 12:00:49,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:00:49,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:00:49,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:49,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:00:49,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:00:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 12:00:49,607 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:00:49,611 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:00:49,611 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:00:49 BoogieIcfgContainer [2018-10-02 12:00:49,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:00:49,612 INFO L168 Benchmark]: Toolchain (without parser) took 234680.83 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -194.0 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 251.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2018-10-02 12:00:49,613 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. [2018-10-02 12:00:49,614 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:00:49,614 INFO L168 Benchmark]: Boogie Preprocessor took 25.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:00:49,614 INFO L168 Benchmark]: RCFGBuilder took 319.45 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:00:49,615 INFO L168 Benchmark]: TraceAbstraction took 234285.39 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -194.0 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 230.6 MB). Peak memory consumption was 36.6 MB. Max. memory is 7.1 GB. [2018-10-02 12:00:49,616 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 44.68 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 25.17 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 319.45 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 234285.39 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -194.0 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 230.6 MB). Peak memory consumption was 36.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 119 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was analyzing trace of length 119 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 234.2s OverallTime, 170 OverallIterations, 57 TraceHistogramMax, 108.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 680 SDtfs, 1559 SDslu, 6255 SDs, 0 SdLazy, 161153 SolverSat, 1935 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19869 GetRequests, 14801 SyntacticMatches, 112 SemanticMatches, 4956 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 101.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 169 MinimizatonAttempts, 1596 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 107.5s InterpolantComputationTime, 20599 NumberOfCodeBlocks, 20599 NumberOfCodeBlocksAsserted, 1579 NumberOfCheckSat, 20264 ConstructedInterpolants, 0 QuantifiedInterpolants, 6820284 SizeOfPredicates, 110 NumberOfNonLiveVariables, 44571 ConjunctsInSsa, 13042 ConjunctsInUnsatCore, 335 InterpolantComputations, 3 PerfectInterpolantSequences, 123421/363885 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_12-00-49-625.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_12-00-49-625.csv Completed graceful shutdown